You can find the links for all the squares in the crochet along here. The free pattern is below, but if you’d like the ad free printable version, it is available either as part of my Lifetime Pattern Pass, or you can purchase it on its own for £5 from Ravelry
This pattern is written in US terms, but the UK translation is below.
UK Translation
Single crochet (sc) = double crochet
Double crochet (dc) = treble crochet
The Pattern
Click here for the left hand video,
Click the image below to play the right hand video
For this square we’re using a 3.5mm hook.
If you find this hook size uncomfortable with aran/worsted yarn then go up to a 4mm, but you must also increase your hook size by 0.5mm for every square in the CAL if you do this.
Start by making a foundation chain of 31. I recommend putting a stitch marker in the first loop from your hook as the turning chain will count as a single crochet.
Row 1. In the 3rd chain from your hook, make a dc (your turning chain counts as a sc)

*Sc in the next stitch, then dc in the next stitch* repeat between *and* until the end of the chain, finishing with a dc – 30 stitches

Turn.
Row 2. Chain 1 and single crochet in the first stitch (the chain 1 does not count as a stitch)

*dc in the next stitch then make a sc in the following stitch* repeat between *and* in each stitch across, ending with a dc – 30 stitches
Rows 3-20. Repeat row 2
Your square should now have roughly equal measurements on each side.
The Border
To add the single crochet border. Make a standing sc in any stitch on the top or bottom. Sc in each stitch across. When you get to the corner sc 3 in the same stitch – this counts as the final stitch of that row, a stitch for the corner, and the first stitch of the next side.
Start work down the side of the square. In the side of each dc make 2 sc, in the side of each sc make 1 sc.
When complete you should have 32 sc on each side.
The Interlocking Border
Now we can add the interlocking border. This is the only square we add this border to without joining to another square.
Use a 4mm hook for this. As this is the first square you will add this border on all sides. Start in a corner and make a standing single crochet. Single crochet in all 3 corner stitches.
Slip stitch in each of the 3 corner stitches
*Chain 4, skip 3 stitches and single crochet in the next 2 stitches* repeat this across until you reach the corner. Make a single crochet in each of the 3 corner stitches, then repeat the pattern on the next side. Do this for all 4 sides.
The squares will be joined by weaving the border through these loops
Your square is complete!
If you have any questions about the pattern or the CAL, then come on over to the Facebook group – 50 Stitches where you can show us your completed squares too.
I did my first one wrong, forgot to translate from UK to US…… but my block turned out beautiful. I will make another correctly. Still fun!
The instructions are all in US terns, so your square should be spot on xx