Walk into any busy spa and you will find two kinds of product on the shelves: large professional sizes used during treatments, and smaller retail sizes that clients take home. Knowing when to buy which helps you control costs and grow retail sales at the same time.
What is back-bar?
Back-bar refers to the professional-size products you use on clients during services: cleansers, toners, massage creams, masks, gels and ampoules in sizes such as 500 ml, 1000 ml or 1 kg tubs. They are designed for the treatment room, not the client’s bathroom shelf.
Why buy salon sizes?
- Lower cost per treatment. Larger sizes usually work out cheaper per millilitre, which protects your margin on every facial.
- Fewer reorders. One large bottle lasts many appointments, so you spend less time restocking.
- Consistency. Using the same professional formula every time keeps results and the client experience consistent across your team.
Work out your cost per treatment
A simple habit that pays off: divide the price of a back-bar product by the number of treatments you get from it. Measure roughly how much you use per service (for example, a few pumps of cleanser or a scoop of modelling mask), count how many services one container covers, and add the cost of each product in your protocol. This tells you what each facial really costs you and makes pricing your menu much easier.
Where retail sizes fit
Retail sizes are for home care. When a client loves how their skin feels after a facial, recommending the matching take-home product extends their results and adds income for your business. Many salons follow a simple rule: treat with the back-bar size, recommend the retail size.
Tips for a well-run back-bar
- Date each bottle when you open it and use the oldest stock first.
- Use pumps, spatulas and clean bowls to keep large containers hygienic.
- Store products away from heat and direct sunlight, following the label.
- Keep a small stock list so you reorder before you run out mid-week.
Shop professional sizes
See our back-bar and salon-size skincare, including large-format modelling masks, gels, cleansers and essences, plus treatment ampoules and treatment kits. Approved wholesale accounts can reorder quickly with Quick Order by SKU.