Very Jolly 1970s Enamel Butterfly Brooches.
I actually had one of these when I was a kid...a most prized possession.
The bigger ones are 4cm wide, the smaller ones are 3 - 3.5cm and theya re made of a light metal with a secure catch on the back.

The two at the bottom left on the main photo are glittery and sparkly.
I've also just found a blue one.
Some come on original ALL THAT JAZZ cards.

If you'd like one on a card please let me know.
They came from the packed up stock of an old seaside jewellery shop that closed in the 1980s.

I have 

Big Green & Blue
Big Orange & Brown
Big Shimmery Copper
Little Blue
Little Red & Blue
Little Shimmery Orange & Yellow