Half-Court Dimensions. Half-courts cut the length of a full basketball court in half, not the width. The width remains the same from the original court. A youth half court is 37 feet by 42 feet and a high school half court is 42 feet by 50 feet.

The size of a standard basketball court used in the professional or college ranks measures 94 feet long x 50 feet wide while many high school courts measure 84 feet long x 50 feet wide. Junior high courts can be even smaller at 74 feet long x 42 feet wide. Based on this, basketball half court dimensions would be 47 x 50, 42 x 50, or 37 x 42.