That's the size of a UK two pence or a US quarter.
PAISLEY PATTERN SIXTIES BADGE BUTTON PIN (1inch/25mm diameter) LSD PSYCHEDELIC
PINK HAPPY SMILING ACID HOUSE EIGHTIES BADGE BUTTON PIN (Size is 1inch/25mm diameter)
Ozorath GWR RETRO LOGO BADGE BUTTON PIN (1inch/25mm diameter) GREAT WESTERN RAILWAY
LMS LONDON MIDLAND SCOTTISH RAILWAY COAT OF ARMS BADGE BUTTON PIN (1inch/25mm diameter)
PUNK WINSTON CHURCHILL VICTORY SIGN BADGE BUTTON PIN (1inch/25mm diameter)
1977 BADGE BUTTON PIN (Size is 1inch/25mm diameter) RETRO 1970s DISCO SEVENTIES
