Planning Measurements

I have done a research based on measurements for my final production.  Due to the fact that that conventionally measurements such as lengths and widths of each magazines are comparable, I have chosen to based my magazine from those researches which gave me a brief ideas of what number I should insert for the canvas sizes. Those followings are the approximations of what I will use for software called ‘InDesign’ where I will be designing my page:

Paper
Width: 220mm
Height: 285mm

Masthead
Width: 200mm
Height: 50mm

Headline for double page spread
Width: 210mm
Height: 55mm

Headline for contents page
Width: 110mm
Height: 33mm