Standard Size (12.5" X 7.5") / Large Xl (16.5" X7.5") Steam Mop Replacement Pocket Pads for Euro-pro Shark S3501 S3601 S3901 S3550 Se450 (5, Large 16.5" x 7.5") Standard / Large Size Pocket Steam Mop Replpacement Pads Size: 12.5" x 7.5 (standard) / 16.5" x7.5" (large) 2 sides cleaning face Material: Durable (70% polyester , 30% polyamid), Improve inner mesh lining allow for steam to flow outward easily Velcro fastener with elastic opening to ensure perfect fit and tight