Yeah, I would agree 1000% that direct to disc is the best option, but in my case I already had a printer and a wife who said no way to a new one simply so that I could print some discs. So I went the not recommended route and used adhesive. So, if you have no other option and have to use labels, I would recommend Herma.

There are 2 options depending upon your printer…one for inkjet: http://www.herma.co.uk/en/product-catalogue/labels/data-carrier/cd/cd-labels-maxi-a4-inkprint-photo-quality-8885.html

and one for laser: http://www.herma.co.uk/en/product-catalogue/labels/data-carrier/dvd/dvd-labels-a4-superprint-lasercopy-4699.html

There are both super thin, but you CANNOT use the laser ones in an inkjet printer…tried it (my ignorance) and they will not work. So if your only option is labels, then I would recommend these; if you can pick up a Canon Pixma with direct print option, it is a far better way to ensure the longevity of your device and burned discs.