Yep. I've dealt with this problem once on eBay myself. Never round a blade width to so much as the nearest 1/64 on eBay.

These days I'll state the measurement as a decimal percentage of 1.00 (example, 0.873 inch) in the narrative or photograph the width at the end of the blade with a digital micrometer in exact fractions. If it's 57/64's, so be it.