The outer diameter is 4" and it is 1/32" thin

even young babies

Coloplast Brava® Elastic Barrier Strip Straight

Bedwetting Store Malem Wearable Enuresis Alarm 2-1/9" x 2" x 4/5"

Provides Temporary Relief

Straight Cane with Fritz Handle, US Marine HME Components The outer diameter is 4"Alex Orthopedic Straight Cane with Fritz Handle US Marine, 31" to 40" Adjustable Height, 300 lb Weight Capacity Straight adjustable cane with Fritz solid wood handle. Corresponding colors, emblem and motto. Push button height adjustable in 1" increments. Safety locking silencer. Replacement rubber tip. Height adjustable from 31" to 40" . 300 lb weight capacity.