Here’s our picks of the best Mini-ITX PC cases to buy in 2022. These cases are all under 20L and considered SFF by most PC communities. This is not a definitive list, so please leave your suggestions in the comments.
FORMD T1

FormD T1 is a modular Mini-ITX case under 10L in volume. The FormD T1 v2 is made of aluminium with mesh panels and comes in two variants, T1 Reference & T1 Sandwich Kit.
LIAN-LI A4 H2O

The A4 H2O is water cooling focused Mini-ITX case created through collaboration between Lian-Li and DAN Cases. The case is 11L in volume and features an all aluminium design including the interior frame.
MESHROOM S

Meshlicious from SSUPD (Lian-Li), is 14.6L airflow focuced Mini-ITX case. This case can be purchased with an included PCIe 4.0 riser cable and either mesh or tempered glass side panels.
IQUNIX ZX-1

IQUNIX ZX-1 is an aluminium Mini-ITX case which comes in two variants, the 9.2L air cooling only version and 10.6L water cooling version.
VELKA 7

Velka 7 is a premium Mini-ITX case at 5.9L in volume. The case is made of aluminium and stainless steel and is the smallest vertical SFF case.
DENSIUM 4+ V2

Densium 4 Plus v2 is 5.5L Mini-ITX case constructed of aluminium & stainless steel; with woodgrain front panel that come in few different variants. Pricing starts at US$159 with riser cable purchased separately.