Standard building codes require pool fences to have less than 4" between pickets and a minimum 45" between rails. If fences have less than 45" between horizontal rails, 1-3/4" pickets spacing must be used. Styles that meet standard pool building codes: Style #1 – 48" Tall Style #2 – 54" Tall Style #4 – 54" Tall Style #6 – 60" Tall Style #7 – 60" Tall Style #8 – 60" Tall Style #10 – 60" Tall Style #12 – 72" Tall Style #13 – 72" Tall