A bustier (alternately bustiere) is a form-fitting garment for women, which is traditionally worn as lingerie. Its primary purpose is to push up the bust by tightening against the upper midriff and forcing the breasts up, while gently shaping the waist. Nowadays, it might also be worn as a push-up bra under a low-backed dress, or as a camisole for outer wear. The bustier can also be worn as a half-slip under diaphanous upper garments if a bold display of the midriff is not desired.

A bustier resembles a basque, but is shorter. It reaches down only to the ribs or waist.

Modern bustiers are often made with mesh panels rather than the traditional boning.

The Simplicity Pattern Company is a manufacturer of sewing pattern guides, under the "Simplicity Pattern," "It's So Easy" and "New Look" brands. The company, now owned by Wrights, began in 1927 in New York City. During the Great Depression, Simplicity allowed home seamstresses to create fashionable clothing in a reliable manner. The patterns have been manufactured in Niles, Michigan since 1931, but the products are distributed and sold in Canada, England, and Australia. In some markets, the patterns are sold by Burda, and they are sold by third party distributors in Mexico and South Africa. The company licenses its name to the manufacture of non-textile materials such as sewing machines, doll house kits, and sewing supplies.

Each Simplicity pattern has step-by-step instructions for the cutting, stitching, and assembling of clothes. Simplicity aims to emulate fashion designer clothing, and the company currently produces over 1,600 patterns.

Simplicity Patterns, like most home sewing patterns, consist of tissue paper with numbers and instructions written on it. This paper is pinned on the fabric to be sewn. The hobbyist then stitches and cuts along the printed lines to create the finished clothing.