Please refer to following size list,the dimension is laptop's.
If you are not sure,please feel free to contact with us.

11.6 air:     300×192×17mm
12 inch air:  280.5×196.5×13.1mm
13.3 air:     325×227×17mm
13.3 retina:  314×219×18mm
13.3 pro:     325×227×24.1
15.4 retina:  358.9×247.1×18mm
15.4 pro:     364×249×24.1mm

11 inch sleeve
Huawei Matebook:278.8 ×194.1 ×6.9mm
Surface Pro 1/2 with keyboard: 274.57 ×172.97 ×13.46mm
Lenovo Yoga3 11; 290 ×197 ×15.8mm
Lenovo IdeaPad 100s: 292×202×17.5mm

13 inch sleeve
Surface Pro 3/4 with keyboard: 292.1×201.42×8.45mm
Dell XPS 13 Series: 304×200×15mm

15 inch sleeve
Lenovo IdeaPad 500s/700s: 338×232×13mm
Lenovo Yoga 2/3/4 Pro: 330×220×15.5mm
Asus U305/U303L Series: 323 ×226 ×12.3MM
Lenovo Thinkpad X1`Carbon: 331×226×18mm
DELL VOSTRO 5459：337×233.5×18.3mm