Pls reference the bag outer dimension before your order it :

11-12 inch : Outer : 325 x 230 x 25 mm Inner : 310 x 215 x 20 mm

13 inch : Outer : 350 x 250 x 25 mm Inner : 335 x 235 x 20 mm

14 inch : Outer : 380 x 265 x 25 mm Inner : 365 x 250 x 20 mm

15 inch : Outer : 395 x 285 x 25 mm Inner : 380 x 270 x 20 mm

15.6 inch : Outer : 405 x 300 x 25 mm Inner : 390 x 285 x 20 mm

Form-fitting sleeve bag for 11/13/14/15 inch laptop and ultrabook.
Multiple material provides multiple-layer protection from dust, water, scratching or shocks.
Ultra slim lightweight design which make it so convenient for daily use and traveling wherever you go.
Smooth top-loading zipper on the bag glides smoothly, allowing for an easy and convenient access to your laptop.
Made of durable and waterproof material. Never worry about spilling a drink or walking through the rain when your laptop is in this bag.
Specifications:
Material: Cotton Fabric + Velvet Inside
Features: Waterproof, Dustproof, Wear-resistant
Applicable Gender: Men and Women
Hardness: Soft
Open: Dual Zipper
Size: 11 inch, 13 inch, 14 inch, 15 inch
Color: Black, Pink, Light Blue, Rose Red, Grey, Wine Red

The bag size as following:
11.6 inch: 310*220*25mm
13.3 inch: 340*240*25mm
14.1 inch: 360*260*25mm
15.6 inch: 390*290*25mm

Package includes:
1 * Laptop Bag

Pls reference the bag dimension before your order it :

13-13.3 inch : Outer : 380 x 270 x 25 mm, Inner : 360 x 250 x 20 mm

14-15.4 inch : Outer : 385 x 280 x 25 mm, Inner : 365 x 260 x 20 mm

15.6 inch : Outer : 405 x 295 x 25 mm, Inner : 385 x 275 x 20 mm