The past couple of weeks we've been getting ready, and one of the things I love to do in preparation is label everything with Mabel's Labels. I've been using these labels on the boys' possessions for a couple of years now. I can say that they are very durable - they can go through numerous washings and there is no sign of wear - they retain their vibrant colors, they don't come off, and they do not fray.
They offer various packages, but we like the Ultimate Back to School Combo. It comes with 3 different styles of labels, plus a couple of metal hang tags that are perfect for backpacks and winter jackets.
You can pick your colors and a small image for your labels. Since Pierce is so into robots, it was an easy choice for him this year.
Disclaimer: I received a set of labels for review purposes. The opinions above are my own.