The width of a sleeping pad is an important factor to consider when choosing the right one for your needs. Generally, 20 inches wide is enough for most people looking for a comfortable night's sleep while camping or backpacking. However, if you are taller than average or prefer more room to move around in your sleep, a wider sleeping pad may be worth considering that it offers more space and comfort. The best way to determine what size will work best for you is by trying out different sizes and seeing which fits your body type and preferences the best.