How do I know which size rucksack is best for me? Christopher October 21, 2017 03:06 Updated Follow Check out Sizing Rucks Explained and visit the size tab on each individual gear page. Related articles I wanna train to ruck, what’s the deal? How much weight do I need to carry for my Challenge? Is insurance mandatory? Can I bring Food or Alcohol? Comments 0 comments Article is closed for comments.