Promote Faster Healing of Wounds Top Performance® Elizabethan Collars keep pets from licking, biting or scratching wounds during the healing process. Made of flexible, translucent plastic, collars allow pets to maintain peripheral vision. Neckline and outer rim are padded with felt to prevent chafing. Collar Sizes X-Small through Large have Velcro® tabs to adjust fit; X-Large and XX-Large sizes have metal snaps. Elizabethan Collars are available in the sizes listed below.