Nouns ending in -ette are usually feminine.
The suffix often forms a diminutive.
Is toilette masculine or feminine?
latoilette
The rule behind it
99.3% of -ette nouns are feminine
In context
Excusez-moi, y a-t-il des toilettes près d'ici ?
Excuse me, is there a toilet nearby?
Les étudiants ne doivent pas utiliser cette toilette.
Students must not use this toilet.
Je vais aux toilettes toutes les trente minutes.
I run to the toilet every thirty minutes.