Do I need a new case?

[ThisHappypunk]

Hi, I'm new to PC builds, I curently have one which is set up as:
CiT Dark Star Black Midi Case
AMD FX-6300 Black Edition 3.50GHz (4.10GHz Turbo) Hex Core CPU
GeForce GTX 1060 6GB Graphics Card
1TB Seagate FireCuda Solid State Hybrid Drive
Gigabyte Ultra-Durable GA-78LMT-USB3 Motherboard
8GB 1600MHz DDR3

I'm looking to upgrade my motherboard, CPU and memory to:
AMD Ryzen 5 3600X Six Core 4.4GHz CPU
ASUS ROG STRIX B550-F GAMING (WI-FI) Motherboard
16gb DDR 4 (2x8gb)

Would anyone be able to tell me if that will fit in my current case?
I've had a look on and the only case types are ATX type (mid/full/desktop etc.)
I can't find my specifc case on there but being new to building PCs, if it's a mid tower, how different can it be to other mid towers listed on ?

Should I just play it safe with a new case or is it worth the gamble it all fits?

Competitor removed.

 

[ThisHappypunk]

Cracking! Cheers buddy

 

[ThisHappypunk]

I found the motherboad and cpu as a bundle, which works out cheaper
So i could add an ssd to basket now and it would cost the same as if I got the 3600 and collected them individually

 

[ThisHappypunk]

I'm happy to pay the extra for the b550 and it coming as a bundle with the CPU leaves me with the choice of getting an ssd now or hangin on for a little bit.
Ultimitely, whichever I do end up going for is going to be a pretty good improvement on what I have now and I'm in no rush to to get it all upgraded.. I'm sure I'll have more questions along the way though