Published dimensions (WxHxD): 17.3 x 8.4 x 12.5 cm are valid even for outside! The largest dimension is about 160 mm. In fact this case is much smaller, inside it is rather the 13 x 6 x 5 cm I wonder if it is the same case as the one presented. Yet it is written on the label EHC103 black ...
It is rigid, but the outer walls seem pretty thin, it's not hard plastic.