Isaac Barrow's pocket size Elements of Euclid
Published in Latin in 1655, Isaac Barrow's edition of Euclid's Elements was truly pocket size! Here I am holding a 1659 edition. (Click to enlarge.)
...and here are the Book VII definitions. The correct Latin definition of multiplication (Def. XV) was later incorrectly translated into English so it would be the same as Henry Billingsley's 1570 version.