A brush set box has one dominant dimension and one fragile component, and getting both right is most of the job. The longest brush fixes the internal length. The bristle head decides whether you need an insert. Everything else, width, depth, closure style, follows from how you lay the set out.
Measure the longest brush, then the layout
Take the longest brush in the set and measure it end to end, from the tip of the bristles to the base of the handle. Add clearance at both ends so the brush does not butt against the carton wall and push the bristles out of shape every time the box is handled. That figure is your internal length and it will not change no matter how many short brushes you add.
Next, lay the whole set out flat in the arrangement it will ship in, spaced the way the insert will space them. Measure the total width across the widest part of the row, which on most sets is the ferrules rather than the handles. Then measure the tallest point of the laid-out set, which is usually a fat powder brush head, for the depth.
Protecting the bristles
| Approach | What it does to the dimensions | Suits |
|---|---|---|
| Open cavity with a paper wrap | Smallest carton, but bristles can compress against the wall | Synthetic, resilient bristles and lower price points |
| Die-cut paperboard insert holding handles | Adds little depth, fixes the width to the insert spacing | Most retail sets, keeps the layout looking deliberate |
| Moulded or foam tray | Sets the cavity outright, measure the loaded tray not the brushes | Premium sets, natural hair bristles, gift presentation |
| Roll or pouch inside a box | Depth grows because the roll is cylindrical | Artist and professional sets sold with a carry case |
Where the width surprises you
Ten brushes do not occupy ten handle diameters. Each divider wall in a die-cut insert has its own thickness, and on a corrugated insert that thickness is one board caliper per wall. For a ten slot insert that is nine internal walls, which adds up quickly. Measure the assembled loaded insert rather than calculating from brush diameters, and you will avoid the classic result: an insert that technically fits but that nobody in packing can load at speed.
Ordering
Minimum order is 100 boxes. Price starts from about $0.48 per unit at bulk volumes and is confirmed on your written quote, because brush sets often carry rigid construction, magnetic closures or foil, all of which move the number. The cutting die, the plates, design support, US shipping and a digital proof before anything prints are included. Since tooling is included, cut the insert to your actual brush spacing rather than adapting your set to a generic tray.
Production runs out of West Chicago in the US and Guangzhou in China, in three lanes: rush (expedited production plus air freight, a premium of about 7 to 25% depending on the job), standard (air) and cost saver (sea). The floor is from about 7 business days, plus 2 to 5 for delivery, and specialty imported rigid or magnetic formats can run up to about 12 weeks, so plan a launch backwards from that.
To order the carton, start at custom makeup boxes. If a single mascara or liner is going out alongside the set, the mascara box guide covers the slim-format version of the same problem. Send a photo of your laid-out set with a ruler in frame through the quote form and ask for the box and the insert priced as one unit.
