Anyone know how old Hayate and Kirito are?

Kirito doesn't know his real age. But he said that the grandpa picked him up 20 years ago. His age probably range between 20-25. Hayate being older. Perhaps 26+ (while FL was 18/19)

Or it can be Kirito [20-23] & Hayate [23-26] Not sure though (I forgot if he's either 4, 6 or 8 years older than FL.)

Well they said hayate was 24, so should be 24-25

Thank you!!

Thankss!!