ConvaTec SUR-FIT Natura - 4" Stomahesive Cut to Fit Skin Barrier is an ideal barrier if you have semi-formed to liquid stomal output. The stomahesive barrier is intended to stand up to even acidic output without breaking down quickly. The wafer can adhere to moist or dry skin. The locking mechanism has an audible snap so you will clearly know when it is attached properly. The cut to fit style is perfect for irregular stomas or if your surgery is more recent. It takes time for your stoma to settle to a specific size, the cut to fit allows you to measure and adjust the opening as needed. This is a tape free collar that is sold in a box of 5. The 4" flange size is perfect for larger stomas or fistuals. The overall dimension of the ostomy wafer is 6" x 6".