This Kids R Us Hideaway Bedrail is 43 inches long and 20 inches tall for added safety. The patented HideAway design allows for the bedrail to tuck easily beneath the mattress when not in use. Set up is simplistic and requires no tools. The patented Gap Guard feature securely holds the bedrail against the side of the mattress preventing entrapment. The HideAway Bedrail meets all current ASTM bedrail standards. This bedrail is for children 2-5 years and fits up to a queen size mattress. Assembled Product Dimensions 43L x 20H 1W.