Hello where to find size 40 or 42 (US sizes) jeans?

And size 13, 13.5, or 14 (US size) sneakers? Looked around but no luck so far.

Please share good shopping places and include idiot proof directions / addresses...!

Much appreciated.

you won't find those sizes anywhere. Try some of the Brand Name stores in the malls, Nike, addias, nauitca,etc etc. You may get lucky with some shirts or jackets or sweat pants. You won't find Jeans or shoes.
You will need to have jeans custom made.
There are times when I will walk in a clothing store and the people laugh and wave me away.

^agree. The Nautica store on the first floor of Yohan/BaBaiBan (pudong nan lu / zhangyang lu, pudong) has larger "Docker's" style pants and polo shirts, as does the RL Polo section of Westgate Mall's department store (nanjing xi lu / jiangning lu). Order shoes online from the west.

I actually found a pair of jeans at an obscure tourist spot in Wuxi. They had size 42 blue jeans... There's also a department store called Parksons that sells real LEE jeans but the price was more than I wanted to pay - 630 rmb a pair... I wasn't that desperate...

i have been able to buy size 40 - 42 jeans in a couple of fake markets. In most of the stores that sell jeans (mens) they seem to go to atleast 40 and in some stores up to 46. We paid around 120rmb.
Good luck