Amazon has Hat Organizer for Baseball Caps 2Pack on sale for $14.99.

About this item:

This Hat Organizer for Baseball Caps 2Pack is a wall-mounted hat rack designed for storage and display. It features a strong adhesive hold capable of supporting up to 20 hats. The multilayer design offers multiple hanging points for caps. It includes two mounting options for flexibility. This cap organizer is suitable for use in closets, doors, or as a display. The organizer is available in black. It is intended for storing and showcasing baseball caps.