Learn to join crochet mitered squares as you go

In this tutorial, I will teach you how to join crochet mitered squares together as you go.

This technique can be used to create a huge range of crochet projects from winter accessories like scarves, to homewears such as blankets or pillows or garments.

Pretty much any crochet pattern that uses square motifs can be created with joined mitred squares.

A collage image with three pictures of mitred crochet squares in different stages of joining. A text overlay reads; crochet mitred square joining tutorial.

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You can find a separate tutorial for a basic mitred square here. This tutorial focuses on the joining technique and includes a step by step photo guide as well as both right and left handed video tutorials.

A crochet length of fabric made up of 24 mitred squares is seen in portrait from above on a blocking board. — A series of 24 crochet mitred squares connected using the join as you go process demonstrated in this tutorial.

Joining Tutorial Notes

I use US terms throughout this tutorial and have worked with 4mm crochet hook and around 15m of 4ply yarn. You can change your hook to suit the yarn you are working with and your own tension.

I used my clover amour hook.

The yarn used for this tutorial was River Knits Nene 4 ply minis, 100% Bluefaced Leicester Wool, 20g mini skein = 80m/88yds.

A series of joined crochet mitred squares lays flat on a blocking board with a clear bag of the leftover yarn placed next to it.

Stitch abbreviations

US terms given. (UK Equivalent in Brackets)

BLO = back loop only
ch = chain
PM = place marker
rep = repeat
RS = right side
sc = single crochet (UK double crochet)
sc3tog = single crochet 3 together (UK double crochet 3 together) – see special stitches
sk = skip (UK miss)
yo = yarn over

Special Stitches

Single Crochet 3 Together (sc3tog)

Insert hook into first st, yo, pull up a loop (2 loops on hook), insert hook into next st, yo, pull up a loop (3 loops on hook), insert hook into next st, yo, pull up a loop (4 loops in hook) yo, pull through 4 loops to complete the stitch.

How to join crochet mitred squares

The video tutorials demonstrating how to join mitered squares can be watched below. These are followed by a written and photo tutorial which includes a schematic outlining the joining process. You may find it useful to watch the video in conjunction with the written instructions.

Video Tutorial

You can find the right handed video tutorial here:

And a left handed version here:

Written and photo tutorial

Begin with the ‘first square’ – Square A

You will start by working a single crochet back loop mitered square, which will be known as the ‘first square’ or Square A.

The first square begins with a chain of 42 and has 20 stitches / rows along each side. The tutorial is written using this size square, but you can use the same principle with any size or style of mitered square.

Below are the basic written instructions for Square A, You can find a full written, photo and video tutorial here.

Written instructions for square A

Row 1 (RS): Ch42, 1sc in second ch from hook, 1sc in next 18 ch, sk next ch, 1sc in next ch, PM in st just made, sk next ch, 1sc in each ch to end, turn. 39 sts

Row 2: Ch1 (does not count as a st throughout), 1sc BLO in next 18 sts (up to st before marked st), sk next st, 1sc BLO in marked st, move marker up to st just made, sk next st, 1sc BLO in each st to end, turn. 37 sts

Row 3: Ch1, 1sc BLO in next 17 sts (to st before marker), sk next st, 1sc BLO in marked st, move marker up to st just made, sk next st, 1sc BLO in each st to end, turn. 35 sts

Row 4: Ch1, 1sc BLO in each st across to st before marker, sk next st, 1sc BLO in marked st, move marker up to st just made, sk next st, 1sc BLO in each st to end, turn. 33 sts

Rows 5-19: Rep Row 4 until you have 3 sts remaining

Row 20: Ch1, sc3tog BLO

Ch1 to secure the final stitch (does not count as a st) and fasten off.

Block to shape and weave in ends.

A finished, unblocked crochet mitred square in pink yarn is held towards the foreground with a purple crochet hook blurred in the background.

Decide on your layout

Decide how you want to join your squares.

In this example, I start at the sop right and work backwards and downwards (see schematic below).

The key to being consistent using this method is to ensure you’re always joining the new square to the row-ends of the previous one(s).

The two types of join

There are two ways to join your new mitred square as you work it.

The first is to join it to one side of another square. This may be a square above or one to the side. This is seen as square B in the schematic below.

The second way is where you join the new square to the sides of two previous squares – one above and one to the side. This is seen as square C in the schematic.

The joining diagram below will help you visualise this process, showing you where to start and where to join each new square:

A basic schematic showing how to join crochet mitred squares as you go, including guidance on where to join each square and which direction to crochet.

Note that this diagram includes 9 squares but the tutorial only demonstrates with a total of four squares to show you the basic principle.

Join the second square (Square B)

To begin the second square, you will join your yarn to the corner of the previous square (as demonstrated in the joining diagram);

A crochet hook joins a ball of green yarn to a completed pink crochet mitred square.

Row 1 (RS):

Ch21 (where 1 stitch is a turning chain which does not count as a stitch).

A chain of stitches in green yarn is attached to a pink mitred square showing the beginning of the joining process.

1sc in second ch from hook and next 18 ch;

The first row of joining a crochet mitred square to another square as you go.

sk last ch, 1sc into corner where yarn was joined, sk first row-end on the previous square, 1sc into next 19 row ends, turn. 39 sts;

The second row of a second crochet mitred square has been worked into a first mitred square.

When working into the row ends, you can work one stitch in each row end because single crochets are square. It can create a nice neat join as seen below.

A close up of a row of green crochet stitches worked into the row ends of a pink mitred square.

Rows 2-20: As Square A

Half of a green mitred square had been crocheted into a complete pink mitred square as part of the joining tutorial.

Two crochet mitred squares, unblocked, the second green square having been joined as yo go.

Joining the Third Square (Square B)

The third square will be worked the same way as the second, but joined on the opposite corner as seen in the turquoise yarn below;

Row 1 (RS):

Ch21 (where 1 stitch is a turning chain which does not count as a stitch).

A chain made from turquoise yarn showing where to join and start a third crochet mitred square using the join as you go technique.

1sc in second ch from hook and next 18 ch;

Crochet mitred square step by step joining tutorial showing the first row of the third square.

sk last ch, 1sc into corner where yarn was joined,

Crochet mitred square step by step joining tutorial showing where to start the second part of the first row on the third square.

sk first row-end on the of previous square, 1sc into next 19 row ends, turn. 39 sts;

Two joined crochet mitred square with a third square in turquoise yarn in progress.

Rows 2-20: As Square A

Crochet mitred square step by step joining tutorial showing the third square after three complete rows.

Three crochet mitred squares, a pink, green and turquoise one, with a purple crochet hook laying beside them, The squares were joined using the jayg method.

Make the Fourth Square (Square C)

Square C is made by working into two sides of previous squares.

The square will start by picking up row-ends on each side, so no chaining here.

Join yarn to base of back of previous square so that you have the sides of two squares ‘in front’ of you;

Pink yarn had been joined to the corner of a turquoise crochet mitred square showing the first step of joining a fourth mitred square to a group of three.

Row 1: Ch1 (does not count as a st), 1sc into each of the first 19 row-ends up the back of the previous square, sk last row-end, 1sc into corner where 3 squares join, sk first row end of next square, 1sc in next 19 row-ends to end of square, turn. 39 sts

The first row of a fourth pink crochet mitred square, joined to two other squares to create a group of 4.

Blow is a close up of what that first row of Square C looks like.

A close up of the first row of a final, pink crochet mitred square, the row worked into the row ends of two previously joined crochet squares.

Rows 2-20:

As Square A.

You will work the final square the same as the others, once you have picked up the row ends.

A joining tutorial for crochet mitred square. The step by step image shows 3 rows of the fourth square.

Below you see the finished four square join. You can continue to join your squares in this way – using Squares B and C to create whatever combination is desired for your project.

Four crochet mitred squares in different colour yarns have been made and joined together as they were created. The last step of a crochet mitred square joining tutorial.

In the case of this tutorial, I continued joining squares to make my crochet mitred minis cowl.

Below you can see the right side of the fabric before it was blocked or joined.

A low angle view of a series of crochet squares joined together.

Here it is on blocking board – excuse the ends, I usually wait until after blocking to sew them in.

A length of crocheted fabric made up of mitred squares pinned out to a blocking board.

And here is the finished ‘mitred minis’ cowl complete with trim.

A crochet cowl made from joined crochet mitered squares in shades of pinks and greens lies on a white sheet.

I hope you have found this tutorial useful and are ready and raring to get your squares joined. If you want to go really large joining your mitred squares, check out the Mitred Minis wrap pattern – perfect for using yarn advent minis or stash yarn.

A patchwork mitred square crochet wrap hangs over a blanket ladder.

If you have any questions about the process, please feel free to drop it in the comments.

Happy Hooking

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How to join crochet mitered squares as you go: Photo and video tutorial

Joining Tutorial Notes