The Bra Expert that Fits Kate Middleton and the Queen Talks Royal Underpinnings

While Princess Di might have popped into the shop (the same one where Kim Kardashian West caused a recent paparazzi frenzy), the queen gets all of her pieces custom made. "They have a special label with a crown on it," Kenton explained, confirming that her majesty never wears anything but pieces created specially for her by the Rigby & Teller corsetieres, a team of two women stationed downstairs in the main London shop. It typically takes about six weeks to produce a made-to-measure bra, and you'll never find a size label inside one.

Rigby & Peller's new New York City store

Kenton's been fitting bras since 1970, making her best pieces of advice time-tested nuggets of wisdom. See her top tips here:

Every woman needs "a wardrobe of bras" including six styles.

We should all have black, skin-tone, and strapless bras, plus a sports style for working out. Finish it off with a slightly padded style that'll help hide erect nipples and "a bra for evening where it's a bit lacy and lower-cut and it doesn't matter if some shows because it's so gorgeous" (she recommends black or a stunning jewel tone). "One bra doesn't do all the jobs."

Putting on your bra shouldn't require an athletic feat of pulling, pushing, and adjusting.

"It should be natural," she told us. "Make sure the underwire is underneath and your breast is in the cup, but it shouldn't be a complicated thing."

When you're bra shopping, it's worth it to make around a lot.

In the fitting room, Kenton led us in a quick series of aerobics to make sure a bra was the right fit. "Put your hands in the air. Now touch your toes. If it stays put through all of that, it's the right fit."

Hook your bra on the middle closure.