There are many e-readers on the market, and they come in different sizes. Even if it is the same size, the molds of different brands are different, so the weight is also different. This table lists the e-readers (aragonite, reading ink, HyRead) that the owner has on hand, and lists their official weight and actual weighing data for comparison. For your reference, the display is as follows (please zoom in and view it yourself) :
Remark 1: Since the Tab X on hand is a prototype sent by the store at that time, a doodroo-like paper film has been pasted on it, so the weight will be slightly heavier than the original machine, but because there is no weight data for the 13.3-inch doodroo film, it cannot be estimated .
A spreadsheet of the above data is attached for the convenience of readers, and there is also a weight of this model together with the original protective case: