Clara Clark (Vnd_US_long-2pc) 2-Piece Adjustable Under Mattress Bed/Fitted Sheet Fastener, Crisscross Strap - Clip Bands Microfiber Imported Set of 2 Long Crisscoss fitted sheet straps, with metal clips Stretchable straps - one size will fit all sizes mattresses even oversized mattresses Adjustable straps from 31" to 63" (80cm to 160cm) Holds tightly in place, bed sheets, mattress pads, tablecloths, ironing board covers, slipcovers and more You will have a "X" form under the mettress after installing