Grade is the tier system that tells you a Gunpla kit’s size, complexity, and engineering ambition before you open the box — from pocket-money entry kits that build in an evening, through the 1/144 and 1/100 mainstream tiers, up to flagship 1/60 builds with full inner frames and hundreds of parts.
Grades are about engineering, not quality: an entry-tier kit is not a worse product, it is a shorter, simpler build. Our standing advice: start one tier below your ambition — finishing a kit teaches more than stalling on one.
See it in context in our kits & grades guides, or explore the tools hands-on in The Bench.