The island is on the reach above Shiplake Lock near Lower Shiplake. It is large and triangular shaped, forming a pair with the similar Hallsmead Ait. It is uninhabited and tree covered and provides mooring on both sides in the back channel.
- Cove-Smith, Chris (1996). The River Thames Book. St Ives, Huntingdonshire: Imray Laurai Norie & Wilson. p. 92 (Map 14). ISBN 0-85288-286-6.
- Location map: 51°29’38"N, 0°53’39"W