Shopping Clothing for big yosd (30cm)?

I can't say for certain, as I haven't seen a Gem of Doll yosd in person, but have you looked at the LUTS petite delf clothing line? They are a larger Yosd, I had one for awhile. I think their clothes are harder to find though. You might have some luck with Loongsoul yosd clothes, my Shao Yue seems to be thicker than most other yosds.

 

I have a 30cm Myou yosd. He often wears msd bottoms (shorts and overalls made for slim msd). Those by rRabbit have elastic waists and fit him well (he has bigger hips than an average yosd too). Slim msd skirts fit well too but can be long. A common search term to try is iMda 3.0. They're 30.5cm and items made in that size fit my Myou 30cm.

 

I have a DF-H 30cm body which I think has similar measurements! To be totally honest I don't have much trouble dressing mine, but I buy most of my clothing from Taobao so that might be the difference? I generally find that taobao clothes have better size distinction once you learn how to use it.

Some listings (like this one) have a specific option for "big 1/6" which means tinies around that 30cm size. But I find that a lot of things I find are purposefully oversized so that 30cm dolls can wear it too.

If you're looking for dresses in particular, I really like this shop! (Here they are on legenddoll too) For lolita-esque dresses, anyways. In my experiences these dresses run big and long... they don't really fit "standard" yosd unfortunately (a little too baggy around the chest/neck), but they fit perfectly on my 33cm girl.