Amazon.com: Hollister Adapt CeraRing Oval Convex Barrier Rings; 7/8" x 1-1/2" (22 mm x 38 mm) - can be Stretched to 1-1/8" x 1-3/4" (27 mm x 43 mm); 89601; Box of 10 : Health & Household
Hollister Adapt Barrier Rings - Outer Diameter: 2" (48mm) - Box of 10 : Health & Household - Amazon.com
Adapt Convex Skin Barrier Ring, 22 mm - Simply Medical