Vitto(tm) Replacement Mop Pads for Shark Pocket Mop Pads S3550 S3501 S3601 S3901 Reasonable price : If you are cost conscious and don't need "original", these are GREAT alternative mop pads for Shark Size : The same size as the origianl Shark pad (7" x 12.7") Designed to fit : Shark and Euro pro models S3550 S3501 S3601 S3901 Easy to use: Won't feel like you are pushing something heavy around the floor Machine washable and easily back to original shape