Quilt measurement charts are available online at a number of websites, including Quiltmaker, HoneyBeGood and Amish Country Quilts, as of 2016. Additional sources for quilt and bedding charts include Generations Quilt Patterns and BeddingStyle.com.
Quiltmaker is an online quilting resource that features patterns and information on fabrics, colors, textures and measurements. The website's measurement chart provides mattress sizes for common bed sizes, mattress depths and suggested quilt dimensions for different bed sizes.
HoneyBeGood is an online retail store that sells quilting and sewing fabric as well as other sewing supplies, such as buttons and thread. The website also features a quilt measurement chart that gives approximate dimensions for different mattress types, including twin, double, queen and king.