No, no measures are possible because every head is a different size. You have to fit it to your own head. I suggest making try-outs in paper quite large and then scaling down until it fits (you can just trim it), then using that as patterns.
I thought this looked familiar... Please give credit to robo3687 on therpf.com for the pattern. :/ Editing the collar lapels off doesn't make it yours. It's generous of you to post a traced pattern for others to use, just please give proper credit where it's due.
Thank you so much for reminding me of that! I found his work there years ago and used it to make my own. There's no need to be rude though, I didn't just edit the collar flaps off or trace it, as there was never a pattern posted, which I hoped to change. However I'd changed computers since then and couldn't find his work again (I've never used the site you gave). I will make sure I give credit now, when I have the time, but tone the hostility down please
I apologize for coming across so harsh, I just don't want to see robo go uncredited as you did use it for a base for yours, that's all.