For those of you that own the original bug shirt, how is sizing with the shirt, i see the sizing chart they have online but im wondering if you like the shirt to fit bigger or closer to just right size?

They list a Large Adult at 40-44" chest, with 31-34" arm.
And the XL is 44-48" chest, with 33-36" arm.

i about 43 chest and 32 for arm.

I have the adult L and it fits me (40" chest) well. Seems to be generously sized. I purchased this item 5-6 yrs ago and at about the same time I got a Eureka Bug Tarp. I have taken both these items on 5-6 years of Canadian trips and never felt I needed them. So they are well traveled but unused.

I wear a XXL in most shirts and got a XXL bugshirt. It's a little baggy, but that might be the design. I don't think it's too baggy, and is does have cinch cord around the waist as well that helps. I'm a 48"-50" chest. I didn't try an XL.