Ring Sizer
$2.00
These reusable ring sizers are simple to use and accurate. I usually wear an 8 on my pointer finger on my left hand, and as you can see in the picture it read an 8 as well.
*Make sure you slide the sizer on and off of your desired finger once you have it set, just to made sure it's not too small or big when going over your knuckle.
