7.8 inch/30pcs and 12 inch/30pcs.Different heights are combined in the aquarium, which is more three-dimensional. The product uses gypsum/polyethylene/plastic/environment-friendly pigment with stable properties. Under normal circumstances, there be no discoloration. Because it's a new product and is shipped sealed in small boxes.So there be a slight smell. Thanks for your understanding. After washing and ventilating with warm water, the smell disappear in a short time,Compressed and curled up the leaves stretch out.