These are made from plastic canvas and yarn, each snowflake is made of two pieces. The two pieces can come apart to mix and match. Each snowflake took around 3 hours to make. I found the plastic canvas in a bin of craft supplies I got from my grandmother and decided to try something with it! I chose this design because the snowflakes measured 3 inch by 3 inch when completed. The most difficult part was sewing without letting the yarn snag on corners of the plastic.