CarCapsule 18 Foot Indoor Inflatable Car Cover and Storage It's easy to order the correct size Simply measure your car from bumper to bumper and from outside of tire to outside of opposite tire, add 6 inches to your overall length and this is the correct size you will need to order The bubble is made from durable 10 millimeter double polished PVC with radio frequency welded seam that protects against accidental damages The basemat is made from 18 millimeter PVC that is mildew, abrasion, flame resistant and also impervious to oil, gas, and antifreeze Heavy-duty 100% nylon coil zipper to prevent scratching Overall Size 18ft - 216inx78inx68in (Length x Width x Height)