Do It Yourself Diy Baseball Hat Rack . Just grab two wooden slats and assemble them together making a beautiful shelf and then add the baseball knobs to bottom side of the shelf to gain also a cap hat rack. Check out this pegboard hat rack! Woodstock Hat Rack for Baseball Caps Single Vertical Rack Holds 8 from www.pinterest.com 4 diy hat rack wall mount. Cut (if necessary) copper pipe to measure the wall space you have. 4 diy spinning shoe rack.