Trench: This trench runs large (it is cut for an oversized fit). I am wearing a size 14 and it has lots of room in it.
Jeans: My jeans are from Charlotte Russe. I wasn't sure of the fit so I opted for a size 18 (although I am a 16). The 18 ended up fitting better and it does indeed have stretch in it.
Shoes: I am wearing Sam Edelman shoes, in a size 10.5. These run true to size.