A seat belt extender can add some well needed length to a standard seatbelt. As most car manufacturers do not take into account the length of a universal seatbelt for those who may need a little extra, car owners are forced to look for them elsewhere. A seat belt extender connects to your existing belt buckle by adding at least 8 inches in length. For obese people this will enable them to continue being independent by using their car for day to day transport and errands such as shopping. Pregnant women can also benefit from a seat belt extender as they may find wearing a constricting standard seatbelt to be uncomfortable after some time when they have a bigger belly.