Everyone seems to have the same problem when deciding what size clothes does my doll wear. I am not a pro, however I have taken my best guess a few times and here is what I found to be a big help. Here are 2 sizing charts that seem to work good for me. Also keep in mind the majority of dolls are made across the pond where small sizes are the norm unlike here in the USA, also many figures are derived from sculptures rather than cast from real people, so sizes are "dreamed up", (aka, huge breast, extra small waist, huge butt) Many dolls are very short almost like child size, so child sizing charts may prove to be more helpful. So you might have to get use to hunting for clothes in the children's section of clothing. So as far as sexy clothing you may be out of luck, unless you know how to sew. However, not all is lost, costume shops and the like may be your answer. Cosplay shops offer such outfits, be prepared for "sticker shock" when it comes to price. Another and low cost alternative to this is the local "goodwill" store. Mix and match from the selection they often have using the sizing charts I have posted below. For example pants, and shorts can sell for say $2 or $3 each, tops can be similar pricing, dresses can range $5 to $15, shoes can be low priced as well from 50 cents and up a pair. A plus to buying clothes this way is fading of colors has already taken place so less chance of color bleeding onto your doll. A word of warning sometimes you can get unwanted extras, so take normal precautions washing, and drying before using. With all of that being said here are the sizing charts.
Thanks for posting this, you're very helpful!
If I may add a tip for sexy clothing:
As someone who likes bras and lingerie (on girls of course) I know from experience that it's hit-or-miss with our dolls.
One trick I use to get bras to fit is tying the band in a knot (carefully of course. Good bras are expensive);around the back. Bobby pins and diaper pins work a little better as you can wrap the band and pin it.
This trick really works. Just check out my thread featuring my doll Satomi. The bra fits her so perfectly, you can't tell it's tied.
Of course, the shape of your doll's boobs matters too. Just like live women, dolls' boobs come in different shapes depending on the manufacturer. This, too, is from experience.
I've found the best bras that work are wire-free but underwire is doable.
Exactly what I use and for the shoes I bought a foot scale from Amazon for 8 bucks