Guide for the SIGONNA Wired No-Tail Glasses Strap.
M vs L
- M (13") — smaller head or tighter fit.
- L (15") — most adults; start here if unsure.
FAQ
How is wired different from silicone tunnel hole?
This listing has a steel wire core for a firmer hold. The silicone tunnel-hole strap is all-soft silicone in M / L / XL.
Need XL or a 2-pack?
See steel wire silicone 2-pack or silicone tunnel-hole strap.