Cricket Ball Types: Dukes, Kookaburra, and SG Compared

In international cricket, three manufacturers supply balls approved for Test cricket: Dukes (England and some other boards), Kookaburra (Australia, New Zealand, South Africa, and the ICC for tournaments), and SG (Sanspareils Greenlands, used exclusively in India). Each ball has distinct construction, seam characteristics, and aerodynamic properties that affect swing, pace, and reverse swing differently.

Dukes Ball (England and the Caribbean)

The Dukes ball has a pronounced seam that stays up longer during a match, continuing to offer conventional swing well into the 30s and 40s overs — well beyond when a Kookaburra would lose its shine. Dukes' prominent seam is hand-stitched and does not flatten as quickly. This is why England Tests have traditionally been high-wicket, low-scoring affairs — the ball assists bowlers for longer.

Kookaburra Ball (Most of the World)

The Kookaburra has a less prominent seam that flattens faster, losing conventional swing earlier in the innings (often by overs 15-25). This creates a dead ball period in the middle overs that batters exploit. However, the Kookaburra generates substantial reverse swing once old — from approximately over 40 — making death bowling in Australian and South African conditions a specialist skill.

SG Ball (India)

The SG ball is softer leather, with a seam closer to Dukes in prominence than Kookaburra. It swings in Indian conditions more consistently than the Kookaburra but is considered less durable. The SG ball generates spin from the pitch differently when old — it roughens up more unevenly, creating variable bounce that benefits spinners.