Small

Ordered a small and it slips over my tumbler perfectly, no stretching or bunching at the base. The fabric feels thicker than I expected, so it actually keeps condensation off my desk.

Honestly wasn't expecting much for the price, but the insulation is legit—my drink stayed cold through an entire afternoon of errands. The small size fits perfectly in my car cup holder and doesn't slide around, which is a huge win. Already thinking about grabbing another one.

This little thing has become my everyday sidekick, the lid seals tight enough that I can toss it in my tote without a worry. It keeps my coffee hot way longer than I expected for the size.