Waggletops - Dog Bed Cover Sheet - Fleece - For Rectangle Dog Beds & Replacement Covers Dog bed covers that work like fitted sheets. Easy to pull off - no zippers. Machine wash and dry. And dogs LOVE 'em. Customize the fit for all rectangle pet beds - even bolster - using adjustable elastic. Great as a replacement cover for your dog's favorite bed too. Save money and keep dog beds out of landfills. Large fits beds up to 66" x 52" measured floor-to-floor. Please use instruction diagram on the left to make sure you order the right size. Designed and sewn by women in Bend, Oregon who believe that dogs make the world a kinder, gentler place for us all.