best canvas size for A4 landscape target
 

hello,

i am new to Omnigraffle so apologies in advance if this is a weird question.

i'm creating some wireframes in Omnigraffle, which i am later intending to import to an InDesign document comprised of A4 landscape pages. i want the wireframe materials i'll be creating in Omnigraffle to be proportional to the A4 landscape pages in my InDesign document, so when i'll import them later they will fit perfectly to my document.

which canvas size should i use?