For precision crafts such as quilting and woodworking, it pays to keep a ruler or measuring tape on hand. However, for many other crafts -- from miniatures to scrapbooking to certain knitting or crochet projects -- you can make do with a close estimate. You can use parts of your body, items from your wallet or common household objects to gauge an inch fairly accurately.
Use Your Body
1. Between the first and second knuckles on your index finger
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Crook your index or pointer finger; the bone between the first and second knuckles measures about an inch long.
2. Your thumb from tip to first knuckle
Hold your thumb against the materials you're measuring. For most people, the thumb measures about an inch from tip to first knuckle.
3. One-quarter width of the palm of your hand beneath the knuckles
Compare the width of your hand to your crafting materials. The width of the palm of your hand, right beneath the knuckles, is about 4 inches on most people -- so one-quarter of that distance would be 1 inch.
Check Your Wallet
1. Short edge of license, credit card is two inches long
Measure your materials against the short edge of your driver's license, credit card or just about any other rigid plastic card in your wallet. These cards are almost always standardized to measure 2 inches along the short edge, so half of that is 1 inch.
2. Business cards are 2 inches along the short edge
Use business cards instead. A standard business card also measures 2 inches along the short edge.
3. Fold a dollar bill, it is 1 and 1/4 inches
Fold a dollar bill in half the long way. In the United States, all modern paper currency -- dollar bills and any other denomination -- measures 2.5 inches by 6 inches. Folding it in half doesn't give you an exact inch, but at 1-1/4 inches, it's still a pretty close measure.
Other Household Objects
1. 3 by 5 inch index cards
Check your index cards. Fold a 3-by-5-inch index card into even thirds along the long axis, and you have an accurate inch-long measure. Fold a 4-by-6-inch business card once along the long axis, then again along the same axis, to get an inch-long measure along the short end.
2. Quarters are 7/8-inch wide
Empty out your piggy bank. The easiest coins to use for inch-long measurements are quarters -- which are 7/8-inch wide -- and nickels, which are 3/4-inch wide.
3. tea light candles are 1 and 1/1 inches wide
Check for other handy household objects that can help you approximate an inch. These include flat-headed thumbtacks, which are just over a 1/4 inch wide; tea light candles, which are about 1 1/2 inches wide across the bottom; and standard-size staples, which typically measure a 1/2 inch across the middle and a 1/4 inch along each side.