box size

Initial tests And I printed out one of my designs on a full sheet of paper by mistake found out that it was about the size of the tiny box of raisins so that wouldn't work. I then tried to do it on the A3 sheet of paper and it's massive sadly to resize it and do some quick maths with volume in order to figure out what size it would have to be. I like the look of the box can but I feel like it's not quite right yet, as it seems amateur esk and I would like to do better. I did some maths and i'm not sure if it's right um but I think I've calculated out the size of the packaging now to get angle right and everything it looks fine when I print it out so it has to be good enough.

edit

Since I can't access my prototypes as they are in the studio i still have any photos of the prototypes as I apparently forgot to photograph them and put them on the blog when I made this blog post which is great. my sketchbook is also at uni which it's just great so I've lost my development stuff they haven't photographed yet as I usually like put them on afterwards. I don't know what to do about it but there's literally nothing I can do as it seems.