Finishing My Granny Square Vest: A Complete Guide to Blocking, Joining, and Edging Your Crochet Project

There is something deeply satisfying about reaching the final stages of a crochet project. After weeks — or sometimes months — of working through stitch after stitch, color after color, you find yourself sitting at a table surrounded by a pile of finished granny squares, knowing that the most exciting part is just around the corner. Finishing a granny square vest is one of those milestone moments in any crocheter’s journey. It combines the meditative rhythm of the making with the more technical, detail-oriented work of assembly, and the result is something you can wear, show off, and feel genuinely proud of.

In this post, I’m walking you through the entire finishing process for my granny square vest — from weaving in ends and blocking, to choosing your joining method and adding a polished border. Whether you’re following along with your own project or just curious about how it all comes together, I hope this is useful, encouraging, and maybe even inspires you to finally pick up that unfinished bag of squares sitting in your yarn basket.

A Quick Look at the Project

My granny square vest has been a long time in the making. I started it with a simple goal: use up some of my yarn stash while creating something wearable and a little bit vintage-feeling. I chose a classic granny square pattern with a solid color center and three rounds of alternating colors, keeping a consistent neutral as the final round on every square to help them all coordinate once assembled.

The finished vest is made up of 48 squares total — 24 for the front and 24 for the back, with the armhole shaping created by simply leaving columns of squares unjoined on the sides. It’s a relatively straightforward construction method that works beautifully for beginners and experienced crocheters alike, because the fitting and shaping happen at the assembly stage rather than during the crocheting of the squares themselves.

If you’re working from a pattern, now is the time to pull it out and refresh yourself on the layout. If you’ve been making it up as you go (no judgment — I often do this too), sketch out your arrangement before you start joining. A quick phone photo or a rough drawing on paper can save you from accidentally joining squares in the wrong direction.

Step One: Weaving In All Those Ends

Let’s be honest. Weaving in ends is nobody’s favorite part. But it is absolutely essential before you block your squares, because blocking changes the dimensions of the fabric slightly and makes any lurking loose ends much harder to deal with after the fact.

For granny squares, I use a blunt tapestry needle and weave each end in at least two directions — usually following the path of the stitches rather than going straight through the fabric. This keeps the end secure without creating a bump on the right side of your work. I also like to give each end a gentle tug after weaving to make sure it isn’t going to pop free.

If you used many different yarn colors in your squares, expect this step to take a while. I usually put on a podcast or a familiar show I don’t need to actively watch, set up my yarn and needle, and just work through the pile systematically. One square at a time. It’s genuinely meditative once you get into the rhythm.

A few tips that make this easier: try to leave longer tails when you cut your yarn during the crocheting stage (six to eight inches is ideal), always use a needle appropriate to your yarn weight, and never — I repeat, never — just knot your ends and assume that’s enough. Knots work loose over time, especially in garments that get washed and worn regularly.

Step Two: Blocking Your Squares

Blocking is the step that transforms your squares from “handmade” to “professionally finished.” It evens out the tension, opens up the stitches, and ensures that all your squares are the same size before you join them. This last point is especially critical. Even slight size variations in individual squares can cause puckering, warping, or uneven seams when you put everything together.

There are a few different blocking methods, and the right one depends on your fiber content.

Wet blocking works well for most natural fibers like cotton, linen, and wool (excluding superwash). You simply soak your squares in cool water for about 20 to 30 minutes, gently squeeze out the excess water (never wring), lay them flat on a blocking mat or a stack of towels, and pin them to the correct dimensions. Let them dry completely before unpinning — this can take anywhere from a few hours to overnight depending on your yarn and your climate.

Steam blocking is faster and works beautifully for plant fibers and many blends. Hold a steam iron a few centimeters above your pinned-out square (never press it directly onto the fabric unless your pattern specifically says to do so) and let the steam penetrate the fibers. This relaxes and sets the stitches quickly.

Spray blocking is the gentlest option and works for more delicate yarns or those with a high synthetic content. You simply pin your squares to shape and spritz them with water from a spray bottle, then let them dry.

I blocked my vest squares using the wet blocking method because I used a predominantly cotton yarn, and the difference was remarkable. Before blocking, my squares were slightly different sizes and the corners curled up a little. After blocking, they were perfectly flat, all measuring exactly five inches by five inches, with crisp, defined stitches.

If you don’t own blocking mats, they are genuinely worth the investment. You can also use foam floor tiles (the kind sold for children’s play areas) or even a folded blanket pinned flat. The key is to have a surface you can push pins into without damaging anything.

Step Three: Laying Out Your Squares

Before you join a single square, spend some time on your layout. Spread all your blocked squares out on the floor or a large table and arrange them in the configuration your pattern or plan calls for. Pay attention to color distribution — you want your colors to feel balanced and intentional rather than clustered together.

This is also the moment to identify any squares that didn’t turn out quite right. Maybe one has a slightly looser tension than the others, or a color repeat that went a bit wonky. You can often hide these in less prominent positions — toward the sides or lower sections of the garment where they’ll be less noticeable.

Take a photo of your final layout before you start joining. You will absolutely bump the arrangement at some point, and having that reference image on your phone is a genuine lifesaver.

Step Four: Choosing Your Joining Method

This is where personal preference really comes into play, and it’s worth thinking carefully because your joining method affects both the look and the structure of the finished garment.

Slip stitch join (flat join): This creates a nearly invisible seam on the right side of the work. You hold two squares with right sides together and slip stitch through both sets of corner loops along the edge. It’s a neat, tidy join that works beautifully when you want the squares to take center stage without a visible seam detail.

Single crochet join: This creates a visible ridge on either the right side or the wrong side of the work, depending on which way you hold your squares. A single crochet join done with right sides together creates a raised seam on the right side, which can look intentional and decorative — many crocheters love this look. Done with wrong sides together, it creates a flat seam similar to the slip stitch join but slightly thicker.

Join-as-you-go (JAYG): If you haven’t already joined your squares as you made them, this method isn’t quite relevant now, but it’s worth knowing for future projects. JAYG involves attaching each new square to the previous one on the final round, eliminating the need for a separate joining step entirely.

Flat slip stitch join (whip stitch with yarn needle): This is a sewn join rather than a crocheted one. You use a tapestry needle and yarn to whip stitch the edges of two squares together. It creates a flat, flexible seam with very little bulk — ideal for lighter weight yarns or when you want a very drapey result.

For my vest, I chose the single crochet join with right sides together, giving me a raised seam that I think of as a design feature rather than something to hide. It gives the garment a structured, intentional look that I find really appealing.

When joining, work row by row rather than square by square. In other words, join all the squares in your first horizontal row together first, then all the squares in your second horizontal row, and so on, before joining the rows to each other. This keeps your work manageable and your seams consistent.

Step Five: Assembling the Vest Panels

Once all your squares in a row are joined, you join the rows together in the same way. For the vest construction, I worked on the back panel and the front panel separately, then joined the shoulder seams and side seams last.

The shoulder seams are typically shorter and more structural, so I reinforced these slightly by working an extra row of single crochet along the inside of the seam before joining. This helps the vest hold its shape when worn.

The side seams are left partially open at the top to create the armholes. The depth of your armhole will depend on your measurements — I left the top six inches of each side seam open, which gave me a comfortable armhole that doesn’t pull or restrict movement.

At this stage, try the vest on. Yes, it might feel a bit rough around the edges — the border hasn’t been added yet — but you need to check the fit before you do any final finishing. Check that the armholes sit comfortably, that the shoulder seams are positioned correctly on your shoulders, and that the overall length feels right. It’s much easier to make adjustments now than after you’ve spent an hour on the border.

Step Six: Adding the Border

The border is where your vest truly comes to life. It unifies the whole piece, covers any slightly uneven edges, and gives the garment a finished, polished look that elevates it from a collection of joined squares to an actual garment.

There are countless border options to choose from. Here are a few that work particularly well for granny square garments.

A simple single crochet border is clean, classic, and works with any style. Work one round of single crochet evenly around all the outer edges — the bottom hem, the front openings, and the neckline — making sure to work three single crochets into each corner to keep the corners square and flat. You can leave it at one round for a very minimal look, or add two or three rounds for more presence.

A shell border adds a decorative, feminine touch that complements the floral or geometric nature of granny squares beautifully. After one foundation round of single crochet, alternate shell stitches (five double crochets in one stitch) with skip-skip-single crochet patterns to create a scalloped edge.

A reverse single crochet (crab stitch) border adds a textured, corded edge that looks far more complex than it is. Work one round of regular single crochet, then work back in the opposite direction with reverse single crochet for a distinctive finished edge that’s very popular in garment finishing.

For the armholes, join your yarn at the underarm seam and work one or two rounds of single crochet evenly around the opening. The key here is keeping it even — too many stitches and the edge will ruffle, too few and it will pull inward. Aim for one single crochet per stitch or seam space and adjust as needed.

I finished my vest with two rounds of single crochet in the same neutral color I used as the final round on all my squares, which ties everything together cohesively. Then I added one round of reverse single crochet for a little texture. The result feels substantial enough to hold its shape but not so heavy that it distorts the drape of the fabric.

Step Seven: Final Blocking of the Finished Vest

After all the joining and border work is done, I strongly recommend doing one final block of the completed vest. This settles all the seams, evens out any tension inconsistencies that crept in during the joining process, and gives the garment a beautifully smooth, even appearance.

Lay your vest flat on your blocking mat, gently smooth it into shape, and lightly steam or wet block as appropriate for your fiber. Pay particular attention to the seams and the border, pinning any scalloped or shaped edges to keep them in place while drying.

When it comes off the blocking mat, you’ll likely feel that rush of genuine pride that every crocheter knows — the moment when you hold up something you made with your own hands and think, yes, that’s it. That’s the one.

Some Things I Learned Along the Way

Every project teaches you something, and this vest was no exception. A few things I’ll carry forward into future projects.

Blocking before joining is non-negotiable. I’ve tried skipping this step before and the results were never as good. Even if your squares look fairly uniform before blocking, the process makes the joining so much easier and the finished seams so much neater that it’s always worth the time.

Color arrangement matters more than you think it will. Spend longer on the layout stage than feels necessary. Walk away, come back, look at it again. The few extra minutes are worth it.

The border can save a multitude of sins. Slightly uneven edges, seams that aren’t perfectly straight, corners that don’t quite meet — a well-worked border draws the eye away from all of these things and creates a unified, polished impression.

And finally: take photos throughout the process. Not just the finished garment, but the squares laid out on the floor, the work in progress, the moment before you join the last seam. You’ll want to remember the journey as much as the destination.

Wearing It

The best part of finishing a granny square vest is putting it on and wearing it in the world. There is something uniquely wonderful about wearing something you made yourself — every stitch carrying the memory of an evening on the sofa, a quiet Sunday morning, a long train journey. Granny square garments in particular seem to carry a kind of warmth and personality that ready-to-wear pieces rarely achieve.

Style it over a fitted long-sleeve top for a layered autumn look, or over a simple summer dress. The vest works across seasons and is endlessly versatile. Wash it gently by hand or on a delicate machine cycle (always check your yarn’s care label), lay it flat to dry, and it should stay beautiful for years.

If you’ve been working on your own granny square vest, I hope this walkthrough has been helpful and encouraging. The finishing stages can feel daunting, but they are so deeply rewarding. Take it one step at a time, don’t rush the blocking, and trust the process. Your vest is almost ready — go finish it.