I purchased these sheets because I thought they would fit my tempur pedic king mattress. The fitted sheet is huge and does not offer a tight fit at all. It's borderline ridiculous how big the fitted sheet and sheet are. I contacted tempur pedic about this issue and showed how big the fitted sheet was. They wouldn't issue a refund even though the sheets had not been slept on or washed. Since I couldn't get a refund I ended up using the sheets on my bed. Ever night I have to readjust the fitted sheet to fit the mattress it was designed for. Also, after 3 washes the sheets are starting to pill. Tempur pedic, quit making sheets because they're defective in every way possible.