The aim of this study is to look at what was the most effective length of bowling spell in the 2018 T20 Vitality Blast. T20 first came about in 2003 and since then has brought innovative progression to the game as a whole (Perera, Davis & Swartz, 2016). This study examines 112 games from the 2018 Vitality Blast; for each game the number of runs conceded and wickets taken per over was recorded. It was found there was no significant difference between the number of wickets taken in an over and the length of the spell X2 (3, n = 2136) = 3.02, p = 0.389. This was also the case for the number of runs in an over, X2 (3, n = 2136) = 7.56, p = 0.56. Thus both null hypotheses were retained. Although there is no significant statistical difference it appears that a four-over spell is best in terms of runs conceded and average runs conceded per wickets taken.