I'm kind of cheating with these examples since they cover a huge time span and some are from different countries (albeit with an intertwined history).
Various farthing sizes throughout the ages:


From top to bottom left to right: English Charles II farthing, British George IV farthing, Scottish James III ecclesiastical and regal farthings (1460 - 1488), Scottish William the Lion (Probably) cut farthing (1165 - 1214), English King Stephen cut farthing (1135 - 1154)
Various 2 pence coins:


English Elizabeth I 6th issue half groat (1582 - 1600), English Henry VII Profile Issue half groat (1502 - 1509) and a British George III Cartwheel 2 pence