Of course a more complete OP would be helpful but I think I'd bet $200 here.
I often wonder about the psychology of round numbers vs odd ones. To me $200 looks more bluffy than $215 but maybe I'm the only person who thinks that way...
Seriously you want to bet size it so that 5x, 77-88 etc. call because they are the majority of the range. There are a few villians who go OMG I call with one pair. Lots of fish call 200/250 with one pair but unfortunately not a pair of sevens or 5x. They go like damn its 200$ should I call here with 56.