Some good crochet patterns for double-thickness potholders include the double thick diagonal potholder at MielkesFiberArts.com, the best crocheted potholder at StitcheryProjects.com and the shells and stripes potholders from FreePatterns.com. As of 2015, the patterns are free to use and print.
The double thick diagonal potholder at MielkesFiberArts.com is typically made with Sugar ‘n Cream four-ply cotton yarn in whatever color the sewer desires. When finished, the square potholder measures around 5 inches. The website includes 15 pictures of the type of stitches needed and the progress of the pattern. This pattern is available for download to the sewer's website, so that they can print it or use it offline.
The best crocheted potholder at StitcheryProjects.com is made from 100 percent acrylic worsted weight yarn, although sewers can use a cotton yarn as well. This pattern includes photographs of work on various rows and skills. There is also a video of the needlework required to finish the potholder. Sewers can access a PDF of the pattern and print it.
The shells and stripes potholders from FreePatterns.com are based on a favored pattern of the 1930s. The fabric to make these potholders should be a size five pearl cotton. This pattern requires the sewer to have intermediate skills.