A standard letter is usually allowed to be up to 1/4 inch (about 6 mm) thick. If it is bigger than that it might not be a letter anymore and could be considered a bigger envelope or package, which usually requires more postage.
the inner mantle of the earth is aproximatly 2850km thick.
A 50 note is typically around 0.115 mm thick.
The mantle layer of the Earth is approximately 2,900 kilometers (1,800 miles) thick. It is located between the Earth's crust and core. The mantle is composed of solid rock that can flow slowly over long periods of time.
The Earth's layers vary in thickness. The crust is thinnest under the oceans, around 5-10 km thick, and thicker under continents, around 20-70 km thick. The mantle extends from the crust to about 2,900 km below the surface, while the outer core is about 2,300 km thick and the inner core is about 1,200 km thick.
The lithosphere, which includes the crust and upper part of the mantle, is typically around 100 kilometers thick beneath the oceans and up to 200 kilometers thick beneath the continents.
Minestrone is a thick soup. It begins with the letter M.
compact
paste
dumb
steak
Hunk.
Thick
Fancy, Giant, Hairy, Thick, Whiny
Impasto is a think paint treatment that begins with the letter I.
gyoza
ropy
paste