Learn Farsi: صورتش کوچک است.

In Farsi, you can show possession by attaching a small word ending (called an enclitic) to the noun. Here, we add -ash to the end of صورت (face) to make صورتش (her face).

The translation says 'her face', but could صورتش also mean 'his face'?

Yes! Farsi pronouns and possessive endings do not show gender. The attached ending -ash can mean his, her, or its. You just rely on the context of the conversation to know who is being talked about.

Do we need to use the connecting sound 'e' (Ezafe) between the noun and the possessive ending?

No, you do not use an Ezafe before these attached possessive pronouns. You attach -ash directly to the noun صورت, making it sound like soorat-ash, never soorat-e-ash.

Why is the word for 'is' (است) at the very end of the sentence?

In Farsi, the verb almost always goes at the very end of the sentence. Instead of the English word order (Her face is small), the Farsi structure builds as Subject + Adjective + Verb, which literally reads as: Her face small is.