I was not happy with any signs I looked at, so I made my own blank label stick.

There are 3 different kinds.

1. Completely flat
2. 1 mm bezel on the label
3. 0,5 mm bezel on the label

I do recommend using some sort of monotonic top layer or ironing if possible for a nice writable surface. Use some isoprobyl alcohol to get marker off or print in black and use chalk, or use a paper sticker