Compartment sizing decides whether an acrylic brush holder is usable or frustrating. The handle—not the bristle head—sets the opening. A holder that looks tidy on a product photo can still pinch thick foundation handles or leave thin liners leaning and crossing.
What size actually works
For most mixed home or salon kits, one open well per brush family is more reliable than many tight holes. A practical default is:
Citable default: Give each grouped well an inner width of 50–70 mm, a depth of 70–90 mm, and a wall height of 80–110 mm. Keep individual liner holes at 9–13 mm inside diameter. Add 2–4 mm clearance beyond the thickest handle in that well.
Tight hole grids (about 8.5–13 mm) suit pencils, spoolies, and slim eye brushes. They do not suit powder, foundation, or most blush handles. Tall open cups (about 60–80 mm inside diameter) suit mixed standing brushes but waste counter space if the kit is mostly liners.
Brush handle ranges that drive compartment size
Handle length and diameter vary by brush family. Published manufacturer-side summaries commonly group handles as short detail tools, mid-length eye tools, and longer face tools.
| Brush family | Typical handle length | Typical handle diameter | Opening that usually fits |
|---|---|---|---|
| Eyeliner, lip, fine concealer | 80–120 mm | 8–12 mm | Hole 9–13 mm ID, or a narrow pencil trough |
| Eyeshadow, brow, small blending | 130–180 mm | 13–18 mm | Open slot or cup; avoid 8–9 mm hole grids |
| Blush, contour, foundation, powder | 190–250 mm | 19–25 mm | Open well ≥ 50 mm wide, wall high enough to stop tipping |
These are planning ranges, not a single brand’s spec. Always measure the thickest handle in the actual kit, including ferrule swell and any rubber grip.
Four common layouts compared
| Layout | Typical inner sizes seen on retail holders | Best for | Limitation |
|---|---|---|---|
| 26-hole slim grid | About 8.6 mm regular holes and 12.7 mm jumbo holes; overall footprint near 140 × 55 × 55 mm | Liners, pencils, mascara wands, slim eye brushes | Rejects most face-brush handles |
| 3-slot low tray | Overall about 180 × 70 × 80 mm; each slot often 50–60 mm wide | A small mixed set on a crowded vanity | Short walls let long powder brushes lean |
| 3-cup stepped tower | Inner diameters around 60–77 mm; cup heights around 78–98 mm | Grouping by size (eye / cheek / face) | Brushes can tangle if too many share one cup |
| Deep 5-well covered box | Each well about 64 × 89 × 220–230 mm | Pro kits, dusty counters, travel between stations | Larger footprint; lid adds height |
A holder is not “more professional” because it has more holes. Hole count only helps when the kit is mostly slim tools.
Clearance and grouping rules
Use three measurements, not one:
- Handle diameter at the thickest point (often the ferrule or grip, not the tail).
- Bristle-head width if brushes will be stored head-up in a shared well. Heads collide before handles do.
- Exposed handle above the wall. If more than about two-thirds of a long handle sits above the rim, the set tips when one brush is pulled.
Clearance rule: Inner opening = thickest handle + 2 mm for a single dedicated hole, or + 4 mm if users will insert and remove the brush one-handed. For grouped wells, plan by head width: one large powder brush needs roughly 45–60 mm of free well width; three mid-size eye brushes can share about 50–60 mm if they are stored ferrule-down and heads staggered.
Do not size only to the handle if brushes will stand bristle-up. A 16 mm handle with a 35 mm blending head still needs a 40 mm-class opening.
Acrylic construction notes (separate from any one factory)
Most tabletop brush holders are cut and bonded from clear PMMA sheet, commonly 3 mm for walls and dividers. Thicker sheet (4–5 mm) shows up on wider bases or taller covered boxes that must stay square. Sheet makers publish thickness charts in the 1.5–12 mm retail range; 3 mm is a frequent choice for small boxes and light organizers because it machines cleanly and keeps weight down.
Avoid treating catalog tensile or impact figures as a promise for a finished holder. Those numbers come from standard specimens under named test methods (for example ISO 527 or ASTM methods on sheet), not from a glued vanity cup full of wet brushes. What matters in use is edge finish, joint area, base width, and whether the unit can rock when a tall brush is removed.
Cleaning also affects sizing. A well that is only 2 mm wider than the handle is hard to wipe. Open cups and 50 mm-plus wells clean faster than dense 8 mm hole grids.
Sizing by use case
Home vanity, 10–20 brushes
Use one 3-slot tray or a small 3-cup set. Put liners in the narrowest section. Keep powder and foundation in the widest cup. Wall height of 80–100 mm is usually enough if the base is at least as wide as the tallest cup cluster.
Makeup artist kit, 25–50 brushes
Prefer several medium wells over one deep bucket. Separate dirty/work brushes from clean face brushes. Deep covered wells around 60 × 90 × 220 mm keep heads from splaying in a bag or on a shared counter.
Retail testers or salon station
Visibility matters as much as density. Open fronts and fewer, wider compartments reduce broken ferrules when clients pull a brush at an angle. A lid helps in dusty open-plan spaces; it is optional in a closed drawer.
Drawer insert instead of a standing holder
Standing height becomes less critical. Size compartments to handle length laid flat or at a shallow angle. Leave finger gaps of 15–20 mm so a brush can be lifted without scraping the next divider.
How to measure a kit before ordering a custom holder
- Lay out every tool that must live in the holder, including spoolies and unused backups.
- Group by family, not by brand color.
- Measure the three thickest handles and the three widest heads with calipers or a ruler across the ferrule.
- Decide storage orientation: head-up (faster grab) or head-down (cleaner bristles, needs a dry cup).
- Add clearance, then add divider thickness (often 3 mm each) and outer walls.
- Check the counter or drawer rectangle last. A well-sized interior is useless if the outer footprint blocks a mirror base.
If the holder is being specified as a wholesale or branded piece, send those six measurements with a photo of the grouped kit. That is more useful than asking for “a large brush holder.”
DisplayMakeup is a Dongguan factory that builds custom acrylic organizers and retail displays for beauty brands; general sizing rules above do not depend on that workshop. For category examples of custom organizers, see the site’s acrylic makeup organizer range and about page.
FAQ
Should every brush have its own hole?
Only if the kit is mostly slim handles. Dedicated holes keep liners from rolling. Face brushes need shared wells because heads are wider than handles.
How tall should the wall be?
As a working check, the wall should cover enough of the handle that the brush cannot pivot out when a neighbor is removed. For 190–250 mm face brushes, 80–110 mm open cups are common; covered pro boxes go much taller because the well itself is the travel case.
Do colored or frosted acrylics change the size?
No. Color and frosting are optical and branding choices. Inner dimensions stay the same. Frosted walls hide residue better; clear walls make it obvious when a well is overloaded.
Can one holder mix brushes and lip products?
Yes, if the lip well is sized to the tube, not the brush. A lipstick tube is often shorter and thicker than an eye brush. Mixing both in one 10 mm hole usually fails.
Is 3 mm acrylic “strong enough”?
For a small tabletop holder with a wide base, 3 mm walls are a common fabrication choice. Strength still depends on joint design and load, not the thickness number alone. Do not cite a generic MPa rating as the strength of a finished cup.
Sources
- Brush handle length and diameter groupings used as planning ranges: handle size summary
- Example slim-hole organizer dimensions (0.34 in / 0.50 in slots): product listing measurements for 26-space holders
- Example open-well dimensions on covered holders (about 2.5 × 3.5 × 9 in per well): published product dimensions from covered acrylic brush boxes
- PMMA sheet thickness ranges in common display work: acrylic thickness chart
- Standard references for PMMA sheet characterization (use the named method, not a marketing summary): ASTM D4802 / ISO 7823 family for acrylic sheet types and characteristics
