We have 2 sizes of bottles, the 5ml and the 2oz. Here is an approximate calculation on how many peels you can get per bottle if you are using a gauze pad. *If you use a cotton pad/disc/ball... the cotton will absorb too much solution and you will waste product.
This will yield about 3 face peels when applying hydroxy acids: glycolic, mandelic, lactic or salicylic.
If this is a layer-able peel such as TCA or jessners, you will get about 3 layers.
2oz. bulk size
This bottle will give you several more applications. Approximately 36 face peels of the hydroxy acids or about 12, 3 layer peels from a jessners or TCA application.
You can see how to estimate based on the layers you are applying. Some will only apply 1 or 2 layers ... hence they will get more applications per bottle. If you are applying 3-5+ layers, then you will be cutting down on the amount of peels per bottle.
If you are doing only face peels, generally our 1oz. box is the best option. If you are looking to cover more body area, then the 2oz. is always the best choice.