The Assure fits wrists from 12.0cm to 21.0cm circumference. It is 2.4cm wide and where the buttons are it is 1.5cm deep, a comfortable size for most fingers. It weighs 34 grammes.
The Dimensions of the Base are 17.1cm x 3.5cm x 11.8cm deep. It is designed to lay flat or stand upright (like a book on a bookshelf).