Ireland will kick-start their Six Nations title defence by hosting England in Dublin on Saturday.
Here, Press Association Sport examines some of they key statistical match-ups for the Aviva Stadium encounter.
Ireland
Tallest player: Devin Toner, 2.08m
Shortest player: Keith Earls, 1.78m
Heaviest player: Tadhg Furlong, 125.91kgs
Lightest player: Joey Carbery, 85.91kgs
Combined pack weight: 904.09kgs
Oldest player: Rory Best, 36 years, 169 days (today)
Youngest player: Jordan Larmour, 21 years, 235 days (today)
England
Tallest player: Courtney Lawes, 2.01m
Shortest player: Dan Robson, 1.73m
Heaviest player: Harry Williams, 131.82kgs
Lightest player: Dan Robson, 81.82kgs
Combined pack weight: 935.45kgs
Oldest player: Chris Ashton, 31 years, 308 days (today)
Youngest player: Tom Curry, 20 years, 229 days (today)
