Lap quilts can vary in size, but most lap quilts measure between 36 inches and 48 inches along each side. According to, a "typical" lap quilt is 36 inches by 48 inches, but this can be adjusted to meet specific needs. suggests that lap quilts can be square or rectangular, and there is a lot of leeway in terms of size. A good place to start is around 52 inches by 52 inches, up to 52 inches by 78 inches, depending on whether you just want a light coverlet to go over your lap or if you plan to snuggle up with a favorite someone on the couch. suggests that lap quilts can be around 60-70 inches by 70-80 inches, but this can vary depending on personal preference. also notes that there is not one specific size that a lap quilt must be, but they will generally be smaller than a throw-sized quilt. In summary, lap quilts can vary in size, but most lap quilts measure between 36 inches and 48 inches along each side.