If you want to put the size of those dudes into future perspective, consider these nuggets:
At the start of the 2017 season, which really included most of Mike Riley's players up front, Nebraska's offensive line was the 3rd smallest group in the Big Ten averaging:
6'3 7/8 .... 298.
The 2020 unit will now be the biggest group in the Big Ten averaging:
6'5 1/2 .... 312 lbs
Coincidentally, when Nebraska first shifted to the 3-4 in 2017, they grossly undersized to play that defense in the Big Ten. Across the board, that unit averaged 6'3 293. The two deep overall, was even worse at 6'2 3/4.... 288.
In 2020, Nebraska's two deep along the DL will average 6'5 1/4... 312 lbs.
When Frost arrived, he self scouted his team quickly and realized they had to dramatically overhaul their size and physicality along the line of scrimmage and in the defensive backfield. They've accomplished both those goals in three seasons.
If they want to make a full transition into a perennial division contender, they need to continue the overhaul at LB. Mike Riley set that position group back to 1960.