This enamel pin is part of the 'Pastel Lover' series. It's a rainbow with pastel colours, it comes in two variants: top band yellow or top band green.
SPECIFICATIONS:
- 4.2 x 2.2 cm (approx 1.6 x 0.9 inches)
- Hard enamel
- Gold plating
- Logo stamped in the back
- Pink rubber backings
Check this link to know more about Seconds (B grade) pins and my pin grading system.