Suit somebody down to the ground
Definition 1 of 1
Pro Tip 1/3British Saying
This phrase is commonly used in the UK, so it's helpful when talking to British people or watching British shows. 
The way they've decorated the pub suits me down to the ground.
Pro Tip 2/3Positive Emphasis
Use the phrase to show you're really happy with a situation or choice, emphasizing a very good fit. 
Having my friend as a roommate suits me down to the ground.
Pro Tip 3/3Personal Fit
It implies that something isn't just good, but it meets personal preferences or needs exceptionally well. 
A flexible work schedule suits her down to the ground since she's a night owl.