im planning on taking out my sagging headliner in my jeep, wondering if anyone knows the dimensions? any advice?

 

Buy a kit. They're $60 with glue and work fine. Just make sure they ship in a round container...

OR, buy headliner fabric from store and Permatex headliner glue from Advance Auto (same as 3M...but in orange can and $7 cheaper).

MEASURE. Width and length and add a foot to each and be careful you don't waste any...you'll need all the width and length you have.

Spray on glue to both substrate and material. Do one-half at a time, don't overspray onto the finished surface of the HL. Wait fifteen minutes. Work the fabric onto the substrate. Don't crawl on the substrate on hands and knees...use pieces of wood or something to distribute the load. It won't destroy the thing to crawl on it but it will leave impressions - not a big deal, but if you're careful it'll come out looking like factory.

Finally, leave enough at the front to fold it under the substrate - there is no trim at the front edge to hide it...you have to roll the fabric around the edge and glue it down. couple inches will do.