For this pink Blanket I used Baby Pink 4 Ply and a 4.00mm hook
Terms and pattern written in US terms.
Please do not overcomplicate this easy crochet pattern because after your first row you are working INTO the SC of PREVIOUS round, ie. putting the stitch combination (sc, 2dc) into each sc of previous round
Ch 2 and work DC, ALL the way around the outside of your blanket
Corners work (2DC, ch2, 2DC) in Each corner.
Written pattern for the crochet wave border (however I have added a very clear video below which I suggest watching to understand the TURN of your work.
Chain 3, dc in next 3 stitches. Work 4 chain stitches, TURN your Work, and slip stitch INTO the top of your chain 3 (4 Dc and a chain 4 space, which you will work the 7 Dc into)
TURN your Work
Chain 1 and work 7 DCs into the Chain space created by the Chain 4.
DC into the next 4 stitches from previous round, and work 4 double crochets, 4 chain stitches and TURN. slip stitch INTO the top of your chain 3 (4 Dc and a chain 4 space) Repeat around.
Finish off by slip stitching into the very first stitch combination.
Fasten off and weave in ends.