"The man's shirt is small."

Translation: Das Hemd des Mannes ist klein.

[juhagan]

Why is -es added to Mann?

[quis_lib_duo]

des Mannes is the genitive case of der Mann.

[jaggggggggg]

Can you explain the case used for the man I thought it was dative but it seems not

[Juergen37040]

Genetive

[rokas768126]

How would a sentence like this be formed with dative?

[OldMate2]

It shouldn't really be dative, but - Das Hemd vom Mann ist rot