If you are unsure as to what size to order we have new plastic sizing rings.
The plastic sizing rings are round not oval but you will get the same accurate measurement. They are the same thickness as the rings that come on the cage. The plastic ring sets are yours to keep so you do not have to worry about a deposit or returning them.
Sizes are 1 1/8″, 1 1/4″, 1 3/8″, 1 1/2″, 1 5/8″, 1 3/4″, 1 7/8″, 2″, and 2 1/8. Included are instructions to get the best possible fit. If you require a larger size ring please let us know.