Coco Peat or Coir Peat Briquettes are small sized coco peat blocks, available in three standard weights – 650 gm, 500 gm and 350 gm, expanding when hydrated to yield a volume of about 6 to 10 liters. Usually shrink-wrapped with label, Coco Peat Briquettes mainly go for retail in chain stores and garden centers for use by home gardeners and hobby growers.