Electronics mounts
Uno R3 (and R4 Minima / WiFi) with the official outline, four ⌀3.2 holes, USB and DC jack positions and the stacking headers.
Solid Vibes StandardElectronics mounts
The 65 × 30 mm Zero with 58 × 23 mm holes, mini-HDMI, two micro-USB and the left-edge microSD slot.
Solid Vibes Standard