Safe and effective way to mark your queen for quick identification (brand may vary). All choices are available, but if following international code use according to this chart: 

For years ending with:

0 or 5 use Blue

1 or 6 use White

2 or 7 use Yellow

3 or 8 use Red

4 or 9 use Green

Weight:0.2 LBS

Width:1.0 (in)

Height:6.0 (in)

Depth:1.0 (in)