Color
Graphite
Herman Miller · 2013–Present
Mirra 2
Agile HM workhorse—Butterfly or TriFlex back with strong refurb availability.
Bottom line
Yes if you want an agile HM workhorse—often cheaper refurbished than Aeron—with Butterfly or TriFlex back options. Rated to 350 lb, with adjustable seat depth, Harmonic 2 tilt, optional lumbar, and fully adjustable 4D arms on common configs. Single-size platform (not A/B/C); no headrest.
Where to buy
Typical prices — new ~$1,695, refurbished ~$550, used ~$320.
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Fit
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Units
Configurations
Available in Butterfly Back and TriFlex Back.
Spec sheet
- Typical configuration
- Butterfly Back, adjustable seat depth, fully adjustable 4D arms
- Era produced
- 2013–Present
- Discontinued
- No
- Approx. MSRP (new)
- $1,695
- Typical refurbished price
- $550
- Typical used price
- $320
- Height range
- 152–188 cm
- Weight capacity
- 159 kg
- Seat width
- 50 cm
- Seat depth
- 41–46 cm
- Backrest height
- 56 cm
- Seat material
- Elastomer
- Armrest type
- 4D Articulating
- Arm adjustability
- Fully adjustable 4D arms on common configs
- Forward tilt
- Yes
- Lumbar
- Height-Adjustable Pad
- Headrest
- None
- Cylinder
- Top-activated pneumatic (low / standard / extended)
- Caster stem
- 11mm × 22mm standard
- Frame
- Polymer + AireWeave seat suspension
- Tilt / lock
- Harmonic 2; tilt limiter / seat-angle options
Size / config variants
| Variant | Capacity | Seat depth | Seat height |
|---|---|---|---|
| Fixed seat depth | — | 41 cm | — |
| Adjustable seat depth | — | 41–46 cm | — |
Revision matrix & serial tag guide
Serial tag location: Underside of seat; Butterfly Back vs TriFlex Back is the fastest visual ID.
| Year | Version | Changes |
|---|---|---|
| 2003 | Mirra (Gen 1) | Original AireWeave / Loop arms generation. |
| 2013 | Mirra 2 | Harmonic 2 tilt, Butterfly or TriFlex back, PostureFit standard, optional lumbar. |
Aftermarket & replacement parts
Compatible cylinder type: Top-activated pneumatic (low / standard / extended). Caster stem: 11mm × 22mm standard. Headrest availability: None.
Spec notes
- Product sheet: 5th–95th percentile population range.
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