Compare rigid shapes and dimensions
Use measured dimensions and account for the shape.
Start with maximum diameter
A rigid profile does not compress like a flexible product. Compare the widest insertable section and usable length. For beads, identify the largest bead rather than comparing just the tip.
Confirm the complete base
Choose a product intended for anal use with a clearly flared base that remains outside the body. Check the widest insertable diameter and the base separately. If the listing leaves those details unclear, confirm them before buying. See Planned Parenthood’s sex toy guidance.