New, still in box. Didn’t measure, my fault. Don’t need. Will include website details. •Comes fully assembled with all hardware needed to install •Straps secure the cover on both sides for driving with the cover open. •Cover can be removed quickly and effortlessly to offer 100% access •A simple latching system allows you to quickly open and close the tonneau cover •Cover is secured by quick release clamps. Keeps your equipment inside your bed dry •When the tailgate is closed, your belongings are safe •Cover can be washed with soap and water 100% BRAND NEW $380 or best offer Fitment: 2014-2018 Chevy Silverado 1500, 5'8" Bed 2014-2018 GMC Sierra 1500, 5'8" Bed 2015-2018 Chevy Silverado 2500HD 3500HD, 5'8" Bed 2015-2018 GMC Sierra 2500HD 3500HD, 5'8" Bed Fits Fleetside Models Only Cab size does not matter as long as you have the correct model and bed size.