All airplane seat belt extenders come with a buckle and clasp that are manufactured with the same materials as standard airplane seat belts and are cut within the same dimensions. According to Airplane Extenders, all buckles must be composed of brushed aluminum material, and clasps must be made of chrome steel. Latching must open and close without hassle and be sewn properly and securely into the belt.
Standard airplane seats are 17 to 19 inches wide, according to Extend Its. An extender can be requested if you have less than two inches of slack with the airline's seat belt. Extenders must match the cross-laced webbing design of standard seat belt stitching. Airplane Extenders points out that stitching must be composed of nylon threading and that almost all extender belts are black.
Seat belt extenders have standard specifications for length and width. The length of an extender can reach a maximum of 25 inches, according to Airplane Extenders. To match the design of airplane seat belts, extenders are measured at a width of two inches.