Question How do i check if a motherboard will fit into a case?

[SnickSnak The FrickFrak]

I am getting a computer from digital storm (The Vanquish 7) and want to get a motherboard with more slots. I also want to install a new processor. How do I check if a motherboard will fit inside the case?
Specs of Vanquish 7
Processor: AMD Ryzen 5 2600
Motherboard: ASUS / MSI (AMD B350M Chipset)
System Memory: 8GB DDR4 2400MHz
600W Digital Storm Performance Series (Supports up to an NVIDIA GTX 1080 GPU)
also any other help on upgrading this PC would be very appreciated!

 

[rgd1101]

You buying a prebuild system from them, they will fit

 

[SnickSnak The FrickFrak]

I want to replace it so I can have more slots, I guess I should be more specific

 

[CountMike]

This one ? https://forums.tomshardware.com/thr...f-a-motherboard-will-fit-into-a-case.3472656/ that's a mini case so no full ATX mbs would fit.