The internal dimensions which are found difficult on the Internet, are, according to the packaging:
27 x 19.1 x 3.8 cm.
Unfortunately, my Eee PC 1005PE with a mass of 26.2 x 17.8 x 2.59 ~ 3.65 cm too much air in the envelope and slipped back and forth.
So overall a perfect product, which unfortunately had not only the right size for my netbook.