This ring sizer works great and gave me mostly accurate measurements. The rings I ordered based off the sizer did come a little bigger than I expected (I ended up putting them on other fingers) HOWEVER, when I re-measured after they came it gave me my accurate size so I think that was me messing up the measuring process haha. Highly recommend this product and its sooooo worth it to know you bought the correct ring size, rather than guessing or trying to do a diy measure at home.