The Card Thickness Guide allows you to safely and effortlessly measure sports & trading card thickness from any angle, even while it is in a trading card holder like a top loader. Measure memorabilia, jersey, auto, or any standard or thick sports & trading cards. Protect the corners, edges, and surface by using our innovative clear plastic thickness guide. Hold the guide over your cards to measure without ever touching the card, or hold the guide at any angle above or below the card to get an accurate measurement of the point thickness. When selecting the right top loader or card protection for your thick trading cards, this guide is your complete solution to measure any trading card. The measurements are accurate to .0001 mm, they are converted to point (pt) and allow you to select a toploader or card holder from any brand.