Goggles are very personal, we can give our opinions on those that we like/dislike but it is down to you to try them on for what feels right
I4s are not the best for big heads, however they are a good goggle system.
I'm even being swayed at the moment, when they originally came out I checked them out and decided they were not for me. But they still tempt me & I tried some on again this weekend
They will mostly cover my chin as long as I keep my mouth shut, and leave a lot of exposed forehead. I also take a lot of headshots
However those can be dealt with, a scarf etc and a headband / cap
Put on as many pairs as possible to see how they feel, consider your pocket with regard to purchase price, replacement / spare lens prices, and whether you would be inclined to keep using them or be tempted by a different pair of goggles in a few months or next year
I tend to wear either of two sets of goggles most of the time, have at least 4 sets and am contemplating more!