What makes these different from plain bootcut jeans?

The row of buttons down the outer seam. It is a decorative detail that also lets you adjust the leg opening slightly, which plain bootcuts do not offer.

Do the side buttons gap or pull?

They can if the jeans are tight across the thigh or hip. Size for your widest measurement and check that the placket lies flat when you sit.

What shoes work with a bootcut leg?

Boots, heeled ankle boots and wedges balance the flare best. Flat sneakers can make the hem look long and drag.

How should I care for the buttons?

Wash inside out on cold and skip the dryer to protect the denim and keep the buttons from loosening. Check the stitching around the placket now and then.

Are they good for curvy figures?

The high rise and bootcut cut are generally flattering on curvy and hourglass shapes. Check the hip and thigh measurements, since the button seam has little give.