The Vindolanda tablets are made from birch, alder and oak that grew locally, in contrast to stylus tablets, another type of writing tablet used in Roman Britain, which were imported and made from non-native wood. The tablets are  thick with a typical size being  (the size of a modern postcard).
Vindolanda tablets are made from local birch, alder, and oak wood, while stylus tablets used in Roman Britain were imported and made from non-native wood. These tablets are typically thick and measure the same size as a modern postcard.