I'm being overly picky with this however finding a supplier would be really satisfying.
I wanna draw a graph leaving a 15mm boarder around it for labeling and other notation.
For simpler/accurate markings I want at least 1 of the lengths a multiple of 100mm
In short I found that C5 paper works well for this, it being 229mm by 162mm (close enough to 230mm)
this means 230-15mm -15mm = 200mm of length the x axis, hence I can cleanly mark every centimeter with a ruler.
the y would be a little obscure at 132mm but I can just assume it goes to 10cm with room for excess.
Anyway this is just a tangent of my actual question,
Can you buy ISO C5 size paper (non-envelope) from any suppliers?
As every supplier listing this size uses it for envelopes, but not just a standard piece of paper.
(yes I am aware that's intended purpose of ISO type C)
My bootleg solution is to buy a B5 packet then cut it down to size but that just seems wasteful and expensive/time-consuming.