Hi I recently bought this laptop https/www.amazon.co.uk/gp/aw/d/B00SYOUD5G/ref=ya_aw_od_pi?ie=UTF8&psc=1#featureBulletsAndDetailBullets_secondary_view_div_1444299463856 dimensions are 428 x 287 x 45-61 mm! I need a decent rucksack that also have space for the power brick and a small mouse. It also needs decent protection and to be waterproof. I bought the laptop for uni not realising how big it would be but I really like it - so I am keeping it.