'repeat' loop doesn't end when requirements met?

I haven't coded in a really long time so i'm quite rusty with coding atm, can someone help me out with this very simple loop problem

local part = script.Parent
local orig = "17, 18, 2"



repeat
	wait(0.001)
	part.Size = part.Size + Vector3.new(0,0.5,0)
until part.Size == orig

Once the part size is equal to 'orig' it doesn't stop the loop. I might be missing a very big point; any help would be appreciated.