In the Amazon product description is: 251 x 217 x 131 cm; 495 g
In the product description from the manufacturer is: dimensions: 16/7 x 10 x 21 cm; External dimensions: 19/15 x 15 x 26 cm; Weight: 500 g
The actual measured size of mine is: 22 x 19 x 12 (outside) just in length makes for a lot. A 70-300 lens together mi body just fits with pure.
The bag that I have received is the right that I have tested. That's why I think that the descriptions are simply wrong.
As the price and the quality is still very good, I'll keep the bag. But beware, if the lens is slightly larger, the pocket too small although the data actually say that it would fit.