The bag dimension as following:
1-For Macbook air 11 inch (11.6 inch)/12inch/ For Xiaomi air 12.5 inch : 345 mm * 245 mm
2-For Macbook air 13 inch (13.3 inch ) A1466 A1369 / for Pro Retina 13 inch A1425 A1502/ for Surface laptop 13.5 inch/ For Xiaomi air 13.3 inch/ for Metebook X Pro : 360 mm * 265 mm
3-For Macbook air 13 inch (2018 ) A1932/ 2019 New For Macbook air 13 inch/ New pro 13 with not touch bar A1706 A1989 A1708/ for macbook 2019 new pro 13 inch A2159 / for Surface pro 4 5 6 / for Metebook X / for Metebook E : 360 mm * 250 mm
4-For Macbook 15 inch (15.4 inch )A1398 /New pro 15 touch bar A1707 A1990/for macbook 2019 new pro 15 inch/ For Xiaomi pro 15.6 inch / for Metebook D 15.6 inch : 390 mm * 280 mm
5- For most laptop 14.1 inch : 380 mm * 270 mm
6- For most laptop 15.6 inch : 427 mm * 300 mm
6- For most laptop 15.6 inch : 427 mm * 300 mm