Two innings — each side bats once for 20 overs (or until all-out); Each over = 6 legal deliveries; each bowler max 4 overs per innings; Match target ~75-90 minutes per innings; total ~3-3.5 hours
Why people argue about this
People often assume that each team only gets to bat twice due to the 20-over limit per side, but in reality, it's about how many times they get a turn at batting within the match structure of two innings. The confusion arises because the 20 overs are split across both sides' turns, not as individual batting sessions for each team.