Accordingly, do leggings fall down because they are too big or too small?
They are too small. If they're too tight, then your extra flesh will keep pushing its way out the top, causing the leggings to slide down. This also results in the dreaded 'Legging Top', which is like a muffin-top but much less tasty. They are of inferior quality and materials.
Subsequently, question is, why do my pants keep falling down? The most common reason your pants won't stay up is related to your body shape and how your pants fit your particular body type. If you have a small waist, but larger hips, your pants may fit too loose in the waist. If you have a larger waist and smaller hips & butt, it's much easier for your pants to fall down.
In respect to this, how do you know if leggings are too big?
Generally, you know that your leggings are too big for you if there is sagginess of the fabric around your knees and crotch area. Most Lululemon leggings, for example, are made of compression panels that make your leggings tight-fitting. When you use it, it molds into your body, especially your waist.
How do I keep my pants up with a big stomach?
Tuck your shirt neatly into your pants. Attach suspenders to the pants to keep them up over your stomach without cutting into your midsection. If you prefer to wear a belt, make sure the belt fits you properly and isn't too tight or too loose.