The protector fits perfectly on our mattresses and goes around it like a fitted sheet. It’s designed to fit mattresses up to 15” or 17” thick, depending on size. The dimensions for the protectors are as follows:
- Twin: 39" x 75" x 15”
- Twin XL: 39" x 80" x 15”
- Full: 54" x 75" x 15”
- Queen: 60" x 80" x 17”
- King: 76" x 80" x 17”
- Cal. King: 72" x 84" x 17”