No such thing aside from Vise-Grips.
7mm is 7mm
8mm is nearly the same as 5/16
9mm - never seen that size used
10mm is slightly bigger than 3/8
11mm is same as 7/16
12mm is 12mm
13mm slightly bigger than 1/2
14mm slightly smaller than 9/16
16mm and 5/8 the same
17mm and 11/16 kinda close
18mm is 18mm
19mm kinda close to 3/4
So 7mm, 12mm and 18mm have zero crossover possibility
8mm, 11mm, 16mm are matches to ASE sizes
The rest depend on things like how tight the bolt/nut is.
There’s a guy on YouTube that makes sculptures out of his 9mm wrenches for that exact reason....he’ll never use it.
“9mm - never seen that size used”
I come across them frequently. Repairing chinese machinery for customers. Some European aircraft stuff. Some brake systems. I mostly see it in chinese stuff though.