I was worried about purchasing this restraint system as I have a King bed and I wasn't sure if it would fit the mattress as well as reach my short limbs as I'm 5'2". Believe it or not it definitely fits underneath the bed and theres a lot of leeway for all for restraints. I wanted a restraint system that was discreet, and could be hidden away when not used. This system does just that, it perfectly tucks away when not in use, the padded satin lined cuffs are comfortable, they don't hurt or show marks even when tightly restrained. They're easy to put on and take off, even by yourself if you want to surprise your lover. I love the mask that comes with it for added sensory deprivation play. I highly recommend this system for the price and knowing that it perfectly fits a king bed as there's two different under-bed strap formations.