Self promotion idea. To stand out, you could simply choose a colored envelope or a different shape of envelope, when you send an invoice or sample etc. A nice white/blue/yellow label would finish it off!
Self promotion idea. OK - no beatng around the bush - this is a serious portfolio - but this may be your competition - so what you may lack in money for a portfolio - make up for it in creativity - see all my suggestions on my Self Promotion Idea Board.
This box design has a very simplistic look to it, however it works quite well as it shows a neat, compact approach. I like how the opening of the box operates, the overlapping of the tabs helps to secure the packaging and keep the product safe.