Nathalie,
Here's an example of everything that you need to have on your label:
Handmade in the U.S.A.
100% Cotton
Origin China
Machine Wash Cold
Tumble Dry Low
Iron if Needed
Monkey&Friends
http://www.etsy.com/shop/monkeyandfriendsOrange County, CA
2011/2012
JFMAMJJASOND-----------------------Month Made ( can also be season)
I make my own labels on printable cotton with an inkjet printer (ink is CPSIA approved) I use a Word Label template that I tweaked until it fit my needs. I like making my own since the Country of origin , fiber content, laundry inst., etc. are variable.
If you would like to use my template, convo me with your email address and I'll send it to you. It is confusing at first.