The Ricoh GR IIIx is 0.8 mm taller and 2.5 mm deeper than the Ricoh GR IV, and as wide and as heavy.
| Ricoh GR IV | Ricoh GR IIIx | |
|---|---|---|
| Size (W × H × D) | 109.4 × 61.1 × 32.7 mm | 109.4 × 61.9 × 35.2 mm |
| Weight | 262 g | 262 g |
| Lens | Fixed lens | Fixed lens |
| Sensor | APS-C | APS-C |
| Announced | 2025 | 2021 |