this one

Pronoun

A specified object, thing or person (especially one nearby or known).

Japanese Meaning

特定の対象、つまり指し示された（特に近くにあるまたは既知の）物、人、事柄

If you're buying a souvenir, I'd choose this one because it's handmade.

お土産を買うなら、手作りなので私はこれを選びます。

Sense（1）

A specified object, thing or person (especially one nearby or known).

Which one do you want?

these ones

（ plural ）