Are these the right measurements?

[ibrahim11]

Hi, I'm making a detritus style open air frame. Because he used inches i converted it to mm so the manufacturer can pre-cut the aluminium tubes. Here are the lengths i provided to the manufacturer:

4 x 229mm
2 x 204mm
2 x 121mm
2 x 64mm

Because when i convert these back to inches they are 0.01 - 0.02 inches bigger then detritus's measurements. Will this make a difference? Thanks

Link to detritus guide: https://bitcointalk.org/index.php?topic=29729.0