The dimensions that the thermal paper needs to be in, or alternatively, the thermal printing tape, vary depending on the model of the card terminal.

Specifically:

Card terminal model

Width 

Diameter 

A80  

58 mm 

50 mm

A920pro, A920, A910 

58 mm 

40 mm 

S900  

58 mm 

40 mm 

S800 

58 mm 

50 mm 

Viva Wallet Contactless Terminal powered by Google Play

58 mm

40 mm

Viva Wallet Contactless Terminal with Professional Scanner powered by Google Play

58 mm

40 mm

Viva Wallet Contactless / Chip & PIN Terminal powered by Google Play

58 mm

40 mm

Did this answer your question?