The Birch Kids Natural Mattress is about 8 inches tall. The breakdown of each layer is below:
Organic cotton cover
Organic wool layer - .5 inch
Organic wool layer - .5 inch
Individually wrapped steel coils - 6 inches
Softer latex - 1.5 inch
Organic wool layer - .5 inch
Organic wool layer - .5 inch
Organic cotton cover