Slim-fit pants or skinny jeans (when made of denim) are tight trousers that have a snug fit through the legs and end in a small leg opening that can be anywhere from 9" to 20" in circumference, depending on size. Other names for this style include drainpipes, stovepipes, tight pants, cigarette pants, pencil pants, skinny pants, gas pipes, skinnies, and tight jeans.

Skinny pants taper completely at the bottom of the leg, whereas drainpipes are skinny but then the lower leg is straight instead of tapering and so they are often slightly baggier at the bottom of the leg than skinny jeans. In some very skinny styles, zippers are needed at the bottom of the leg to facilitate pulling them over the feet because the leg opening is so small. Stretch denim, with anywhere from 2% to 4% spandex, may be used to allow jeans to have a "super-slim fit". Skinny jeans come in a variety of colors and styles.