Size: 36″ x 36″
Hook: K-hook (6.5 mm) – Tight stitch, approximately 1200 yards
L-hook (8 mm) – Looser stitch, approximately 900 yards
Yarn: #5 Bulky, Big Twist Rainbow Classic Yarn (brushed acrylic yarn) Pastels colorway
Stitch: Moss Stitch (multiples of 2 plus 1)
Foundation: Loosely chain 92 (82 for L-hook), sometimes it helps to use a larger hook that is 1-2 mm larger for the foundation chain only.
Row 1: Starting from 2nd chain from the hook, *sl st 1, hdc 1* sl st 1, repeat this to the end (91/81 sts), ch 1 and turn.
Row 2: * 1 hdc, 1 sl st * 1 hdc , repeat to the end. Ch 1 and turn. (91/81 sts) [note: make sure you are going through the back 2 loops when you do your slip stitch because it looks like there are 3 loops to put the hook into but this is just the texture of the pattern]
After you do two rows, check to see if it is 34 1/2″ wide. If it is way off, unravel and go back to the foundation chain and add or take away stitches to get close to this number. Continue repeating Row 1 and 2 until you have reached a total of 35 1/4″ in length. In last chain do a cluster of (1 hdc, ch1 , 1 hdc) to turn to unworked side. Continue Row 2 around all three unfinished sides of blanket making a cluster of stitches at each corner to turn work. Your finished blanket should be approximately 36″ square. Each row is approximately 3/4″
For an heirloom quality blanket, try organic cotton or a soft fine merino wool. Acrylic is best for charity blankets because it can be washed in hot water and put into a dryer, but if it is for your own kids or someone you know, they probably would appreciate a nicer yarn with gentler care. A very soft acrylic chunky yarn is Bernat Softee Chunky but there are other really soft bulky yarns that might be more expensive but may be worth it.
Moss Stitch Video Tutorial: