The U.S. Consumer Product Safety Commission has announced the recall of about 20,000 Simmons Kids Crib Mattresses. Some of the mattresses measure smaller than the 27 ¼ inch minimum width required to prevent gaps between to mattress and crib side rails. This poses an entrapment hazard to infants.

Simmons Kids and the CPSC have received a report of a 6-month old baby becoming wedged between the mattress and crib frame. Fortunately, the baby wasn't injured.

The recall involves open coil crib mattresses manufactured between July 1, 2006 and March 23, 2008 with a color label attached to the top or side of the mattress that has the following model names:

• Pottery Barn Kids by Simmons Kids Lullaby
• Simmons Kids Slumber Time Evening Star Luxury Firm
• Simmons Kids Baby Mattress Series 400
• Simmons Kids Baby Mattress 234 Coil Count

The mattresses also have a tag sewn into the edge which has the date of manufacture and in most cases will contain one of the following model numbers: H59044.15.0014, M59082.15.0002, M59027.15.0002 or M59065.15.0006.

The Pocketed Coils® and Simmons Kids or Simmons Juvenile Products crib mattresses manufactured before July 1, 2006 or after March 23, 2008 are not included in the recall.

These mattresses were sold at Pottery Barn Kids and nursery furniture retailers from July 2006 through May 2008 for between $100 and $150 each.

To determine if your mattress meets the 27 ¼ inch minimum width requirement, remove all bedding and place the mattress on the floor. Using a yard stick or tape measure, measure the width near the middle from the outside edge of the tape binding to the opposite side of the mattress. If yours measures less than 27 ¼ inch, you are advised to immediately stop using it and contact Simmons Kids to receive a free replacement mattress.

You can reach Simmons Kids by calling (800) 810-8611 between 8:30 a.m. and 5 p.m. ET, Monday through Thursday, and between 8:30 a.m. and 2:30 p.m. ET, on Friday or by visiting the firm's Web site.