That's the size of a UK two pence or a US quarter.
Pin's Badge Button Pin Back Concert Tour Sting
VIRGIN MARY MADONNA PORTRAIT BADGE BUTTON PIN (Size is 1inch/25mm diameter)
MOD ITALIAN RETRO SIXTIES MOD BADGE BUTTON PIN (Size is 1inch/25mm diameter) 1960s
PUNK BADGE BUTTON PIN UNION JACK FLAG RETRO SEVENTIES (Size is 1inch/25mm diameter)
NATIONAL SH*TE DAY BADGE BUTTON PIN (Size is 1inch/25mm diameter)
PIXIES BADGE BUTTON PIN (Size is 1inch/25mm diameter)
