11 With these measurements ButlerBuilt or another reputable seat manufacturer should be able to place you in either the proper off-the-shelf seat or fabricate a seat specifically to your measurements. But there is really no replacement for actually sitting in the seat to check how it feels. Butler says that once they are in a properly fitting seat, many drivers will remark that the fit is tighter than they are used to. The fit should be snug but not so much that you will have trouble breathing. Remember, the feel will loosen up a bit as the padding conforms to your shape. A good test is you should never be able to fall right into your racing seat. Instead, getting past the side bolsters (also called rib protectors) should require just a bit of a wriggle. The shoulder supports should be just wide enough for you to slide your hand between the driver’s shoulder and the support—any closer could restrict the driver’s movement.