Are these good for a really big head ?

Thank you for your questions. The Swank XL models fit from medium to extra large faces. We would suggest you, if it's possible to go to a local Tifosi Dealer near your area of residence to try this model and see if it's a good fit for you in looks, fit and comfort. If you would like to see a Tifosi Dealer near you, please enter your zip code here: https://www.tifosioptics.com/store-locator/

Thank you for your question. The temple length is 137mm

Can you replace the lenses if they get scratched?

Thank you for your question. If they ever got scratched, please contact Tifosi Optics. We could sell to you a new set of lenses.

Are these at least 150 mm across the face?

Thank you for your question. The inner distance from temple to temple for the Swank XL model is 137mm and the outer distance from temple to temple is 146mm