According to Huffington Post, women still haven't gotten a handle on this whole bra thing. Wearing the wrong size, not washing them enough, washing them the wrong way—it's like, just get your bra shit together, ladies. The Huffington Post recently spoke with Candece Etafo of Rigby & Peller (a U.K.-based lingerie company, not a law firm) and got the lowdown on all the important bra deets. So PAY ATTENTION, and stop screwing up already.
Because our bodies are constantly changing, Etafo recommends checking in with "your lingerie stylist" to get re-measured every six to eight months (note to self: get "lingerie stylist"). What are we getting wrong? Mostly the band size (it should be tight and not too high up on your back) and the cup size (make sure your whole boob fits into it). And about those cup sizes: according to Etafo, "A D is a D, but a DD is the same as an E. here might be a tiny difference in some retailers, but typically not. In this country we’re used to doing D, DD, DDD but it’s actually D, E, F, G, H, etc."
If you're constantly adjusting your bra straps, you're doing it all wrong. The band should really be doing about 90% of the work. And if your straps are digging in to your shoulders, consider getting shoulder cushions, which are a real thing.
Now let's talk about washing your bras. Etafo says you should hand wash your bras, with a lingerie wash (which has a special ingredient to preserve stretchiness), every three wears (and don't wear it three times in a row, either, because apparently that will stretch them out). If you don't hand wash your bras, you should be putting those bad boys into a special wash bag to throw into the washer, and they should still air dry. So NOW YOU KNOW, so QUIT SCREWING UP. GOD.