This screen door slide or "gizzy" is 9" x 8-1/2" and about 1" thick. The flange width varies from 3/4" to 7/8". Is your original slide cracked or damaged? Here's the replacement you've been needing. This gizzy is designed to prevent bugs from entering the trailer when the main door is open. The opening on various screen doors can vary, so this version may have to be trimmed to fit your screen door. Color varies from ivory to off-white.