Knitting Blocking Mats - Knit Picks
Forget that cumbersome blocking board or random towels lying around the house. These foam rubber mats fit together like puzzle pieces to make the size and shape you need. It is an affordable and portable alternative to blocking boards. One side is smooth, one side is has texture. Contains nine 12.5" light purple squares, 3/8" thick.
See Knit Picks guide to blocking for helpful hints and tips.