Beauty Brass Off Shampoo Showdown: 10.1 oz Bottle vs 33.8 oz Size
Same powerful blue formula in two sizes. Your hair length and wash frequency decide the winner.
| Factor | Matrix Total Results Brass Off Shampoo, | Matrix Total Results Brass Off Shampoo, |
|---|---|---|
| Price | Check price | Check price |
| Size | 10.1 oz | 33.8 oz |
| Price per oz | Check price | Check price |
| Lifespan | 2-3 months | 6-8 months |
| Best for | Most users | Long hair |
| Freshness | Good | Fair |
| Storage ease | Easy | Bulky |
Our Verdict
Most buyers should choose the 10.1 oz bottle for freshness and easy storage. Long-haired or heavy users save with the 33.8 oz size. Blue shampoo stays potent for months when stored well. Buy big only if you tone weekly. Otherwise the standard size wins.
More Top Picks in This Category
Not sold on either of these two? Here are more bestselling options worth considering.
Best for: Brunettes building a complete anti-brass routine.
Matrix Brass Off Shampoo and Conditioner Set
- Shampoo and conditioner duo
- Complete toning system
- For brunettes
- Bundle savings
Pros
- Balanced tone and moisture
- One purchase routine
- Saves vs separate
Cons
- Conditioner tones lightly
- Set may be too much for some
- Blue formula stains
Best for: Quick tone touch-ups between shampoos.
Matrix Total Results Brass Off Toning Spray
- Leave-in toning spray
- Refreshes tone
- No rinse needed
- Travel-friendly
Pros
- Quick tone refresh
- Easy to use
- Great between washes
Cons
- Subtle effect
- Needs frequent reapply
- Can build up
Best for: Dry brunettes needing toning plus deep moisture.
Matrix Total Results Brass Off Mask
- Deep conditioning mask
- Toning plus moisture
- Weekly treatment
- For brunettes
Pros
- Tones and conditions
- Softer hair
- Weekly treat
Cons
- Time-consuming
- Can over-tone
- Pricey
Purple vs Blue: The Level 7-8 Decision
The purple-blue boundary is the least explained decision in toning, and it matters because Brass Off is blue, not purple. The color wheel decides: purple neutralizes yellow, which lives at levels 9 and 10, the palest blondes. Blue neutralizes orange, which lives at levels 6 through 8, brunettes and dark blondes. If your brass looks golden-yellow, you need purple. If it looks coppery-orange, you need blue, and Brass Off is built exactly for that orange. Bronde and dark blonde hair in the level 7-8 zone is where buyers guess wrong most often, because the brass can read either way in bathroom lighting.
The test is a daylight strand check. Pull a section of brassy hair to a window: distinctly yellow means purple, distinctly orange or coppery means blue. When in doubt, strand-test the blue shampoo on a hidden section first, blue pigment on yellow blonde can push tones muddy, while purple on orange brass simply underperforms. Brunettes going lighter should keep Brass Off on hand from the first highlighting session, because orange brass shows up within two weeks of lightening dark hair, faster than most buyers expect. Our best purple shampoo guide covers the yellow side of the equation for comparison.
Reading Pigment Strength and Choosing Your Format
Brass Off pours a deep, inky blue, which signals strong pigment, and strong pigment demands respect for timing. Porous highlighted ends grab blue fast, so apply to the least porous areas first and let the rinse carry diluted pigment through the ends. Start with a two-minute contact time and adjust from there; leaving strong blue shampoo on for ten minutes "for extra toning" is how brunettes end up with slate-gray ends. Acid Violet 43 is the purple pigment to look for on labels, but blue formulas use their own blue dyes, so judge blue strength by bottle color depth and your strand test, not by hunting for a familiar ingredient name.
Format choice is the other half of the framework nobody provides. The blue shampoo is your weekly maintenance toner, the workhorse. The Brass Off Toning Spray handles between-wash touch-ups, a quick tone refresh on day-three hair without a full wash cycle, which is ideal for brunettes who wash infrequently. The Brass Off Mask is for dry brunettes who need toning plus deep moisture in one step, since it combines pigment with a long conditioning contact time. Match format to your profile: healthy brunette washing twice a week lives on the shampoo; dry, porous brunette leans on the mask; anyone stretching wash days keeps the spray handy. For intensive correction sessions, our blonde toning mask guide explains mask technique that applies equally to blue masks, timing and even application matter more than brand.
Cost Per Toning Wash and the 33.8 oz Question
Blue shampoo used once or twice a week makes even the 10.1 oz bottle last months, so cost per toning wash is low across the board, and sticker comparisons mislead. The 33.8 oz size wins on per-ounce price for long-haired or heavy users, but only under two conditions: you finish it within about a year of opening, because pigment oxidizes and weakens over time, and you store it well, because blue shampoo stays potent for months in a cool, dark shower caddy but degrades faster in heat and direct light. Most buyers should choose the 10.1 oz bottle for freshness and easy storage, and buy big only when their usage proves they will finish it.
The conditioner set and mask change the value math differently. Brunettes with dry hair need the toning conditioner anyway, so the shampoo and conditioner set costs less than assembling the routine piecemeal, and the conditioner gives a gentler second toning route for dry weeks. The spray looks like a luxury until you count the washes it replaces: every touch-up that postpones a full wash day saves water, time, and color fade. Buy the size that matches proven usage, not aspirational usage, and the blue shampoo becomes one of the cheapest steps in a brunette routine.