cribs

The standard full-size crib mattress is 27¼ inches by 52 inches, and the crib 30 inches by 54 inches. Compact and portable cribs are 26¼ inches by 39½ inches.

Voluntary standards set by the ASTM and the Juvenile Products Manufacturers Assn. require that the openings between slats be no greater than 2⅜ inches, so that babies' heads can't be caught. The cornerposts also may not rise more than 1/16 inch above the side unless they rise at least 16 inches; a baby could hang by catching clothing on protruding posts.

Safety standards for cribs assume a child less than 35 inches high, and under the age of 2. If cribs are used for taller or older babies, the babies run the risk of falling out.

Cribs should not be placed near dangling window cords (to avoid hanging). Mattress covers should not be improvised out of plastic film (to avoid suffocation). Loose teething rails should be replaced.

Crib sheets are 28 inches by 52 inches (because nowadays they are usually fitted sheets), and crib blankets, about 45 inches by 60 inches.

The 30 inches by 54 inches size was established before 1900, but at that time a larger size, 40 inches by 60 inches, was also sold.*

*1895 Montgomery Ward catalog.