Je te l'ai donné.
Here's a breakdown:
* Je: I
* te: to you (informal singular)
* l': it (masculine or feminine singular)
* ai donné: gave (past tense of "donner" - to give)
Other variations:
* Je vous l'ai donné: I gave it to you (formal singular/plural)
* Je l'ai donné à toi: I gave it to you (informal singular)
* Je l'ai donné à vous: I gave it to you (formal singular/plural)
The choice of "te" or "vous" depends on the level of formality you wish to convey.