I put up a post about blocking crochet squares. It is worth it for the finish and perfect shape. It makes the things you make look so much better . It doesn't take too long and it's not too hard. The puzzle mats are the best way to go because they are not expensive , can be pinned and are easy to make into bigger sizes if you need to do that. This video on blocking a jumper/sweater shows you how to block the bigger pieces. you have created.