Hello there,
Mango has one big seed in the centre. Mango seed is a single flat oblong seed that are fibrous or hairy on the surface, the inside seed coat 1- 2 mm thick is a thin lining covering a single embryo, 4 7 cm long, 3 4 cm wide, and 1 cm thick. Mango seed consists of a tenacious coat enclosing the kernel.
Hope this information helps you.
Good luck!!