The following images are intended to help you understand where to place badges on your uniform. Part of the uniform inspection is to make sure the badging is spaced and aligned properly!
The easiest way to correctly place badges is to ask someone to pin them in place while you are wearing your tunic. While still wearing your tunic, check to make sure that all your badges are centered on your sleeve from top to bottom and both sleeves are even with each other. Also make sure that none of the badges are 'tilted' forward or back - they should look level when you look at yourself in a mirror. Once all of the badges are correctly measured and aligned, sew them in place.