Inches are the everyday unit for small and medium lengths in the United States: phone screens, photo prints, cake pans, rulers and paper. The guides in this section take one inch measurement at a time and show it the way people actually picture it, next to real objects with published dimensions, alongside exact conversions to centimeters, millimeters and feet.
Every conversion here uses the exact international definition of 1 inch = 2.54 centimeters (25.4 millimeters), so the metric figures are precise rather than rounded estimates.
Start Here
A good first stop is our guide to picturing 7 inches with everyday objects, which lines the length up against a ruler, a 5×7 photo print, an iPad Pro, a dollar bill and a pencil. From there, each guide links on to nearby measurements so you can step up or down the scale.
What Each Inch Guide Covers
- The exact value in centimeters, millimeters, feet and yards
- Where the length falls on a standard 12-inch ruler
- Common objects that match it, with their source dimensions
- A quick inches-to-centimeters converter