Sero Thickness Guide
This cushion is available in 3" standard (6cm) or 4" Deluxe (10cm) thickness.
3" standard (6cm) is recommended for those weighing under 15 stone (95kg).
4" Deluxe (10cm) is thicker and firmer and recommended for people who prefer a firmer cushion or those weighing 15 stone+ (95kg+).