This question depends on the cushion used and what aesthetic application you want to create. At Sew Covered, we can help customise your seating to suit the feel and look you are after. We have all the foam suppliers Perth has to offer.
Generally speaking, a 75mm thickness for high-density foam is sufficient for plan cushions and cover seating like bench seat cushions, daybed cushions, window seat cushions, and many more. If you want buttoning, piping, or French seaming, we recommend medium to high-density foam at 100mm thickness covered in dacron. Perfect for bedroom window seat cushions and cosy custom seating nooks.
Foam single seat chairs such as a mid-century modern style arm chair, we might choose a high-density foam seat at 120mm thickness with a latex mix for a slight bounce and a medium or soft density foam shaped and dacron-covered back around 70mm thickness or a flat back depending on the style you want to finish with.
For custom floor cushions, we may choose an inner high-density core foam of around 50mm thick and then add low-density foam to the bottom and top for a soft seat. The core will provide all the support. Sew covered have you covered with all the foam supply options at your fingertips. We pride our brand on offering the most customisable upholstery Perth has available. We must be Australian-made and operated, supporting local small businesses as they support us. It also means we have beautiful Australian boutique suppliers offering foam, fabric and finishing from beautiful European collections and high-end Australian designers.