yes, you will need to scale them. It will depend what printer you are using. For my Ultimaker 2 in Cura it comes out tiny. I think I did; scale to max which is 118 x the original. That gives a width of around 22.5 cm which is bit big for me but better than being too small. You will need to play around with it to get it right for you.
Just as an aside I am having a go at printing the ANT-MAN and CAPTAIN AMERICA helmets to be found on Thingiverse/myminifactory. Not sure if they are from guys on THERPF but I will get some pix of the results up soon
Just as an aside I am having a go at printing the ANT-MAN and CAPTAIN AMERICA helmets to be found on Thingiverse/myminifactory. Not sure if they are from guys on THERPF but I will get some pix of the results up soon