The Haptrik

reasonable price and good sound

Received in a neat package. Pleased with the size, the one I ordered. Excellent workmanship, muted, unobtrusive work of the ratchet.

The index finger is about 6.8cm in circumference, so the size is 13, so I bought it, but it's a little relaxed! 12 to 12.5 sounds accurate. I think I'll be able to buy it later, but now I'm a lot big, so the top code I sell from Daiso (like nail polish) I'll have to apply it to my finger and adjust it. The sound is good enough to solve the real heart!
Additional Feedback :
I wrote it 6.8cm/13, but it is not possible to make a late correction, so it is 12 size, so 6.8cm = 11.5-11 is likely to be correct. ZZ

small click, rolls one way only

Exactly as described. Looks nice. Like a fidget in disguise. Who is doing that clicking? Ha ha! Might buy more if there are different designs.