The dress fits you perfectly. 

 He fitted the shelves to the wall.

The car is fitted with a GPS navigation system.

 This solution fits our needs perfectly.

The travel agent fit us into a group tour. 

Adj 

Fit for 

He is not fit for the job of a lifeguard. 

The car is fit for long-distance travel. 

 "One size does not fit all."  

 suit

This dress suits you well. 

The job doesn't suit his skills. 

The new schedule doesn't suit my availability. 

The furniture doesn't suit the overall decor of the room. 

The hotel aims to suit the needs of all its guests. 

 She suited up in her business dress for the meeting. 

You can choose any seat you like, just suit yourself. 

suitable 

 This dress is suitable for the occasion. 

He is not suitable for the job. 

The book is suitable for children aged 6 and above.