4 Oz Bottles: 120 ml, and the Size That Fits a Peg
By Joe Joo · 8PCK · Shantou · Updated 26 October 2026
4 oz (about 120 ml) is a retail peg size: sauces, lotions, craft oils and sample sets. The unit economics change because the closure costs more than the bottle.
4 oz is a US retail convention; in metric markets it is sold as 120 ml. It is large enough to be a product and small enough to hang or sit on a peg.
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Why 4 Oz Survived Metrication
US retail shelf plans and moulds were built around ounces, so 4 oz bottles are still specified in the US even where the label shows 120 ml.
Sauce and Condiment
38 mm neck, small orifice cap.
Lotion and Craft
24/410 with a disc or flip top.
Cost per Unit
At 120 ml the cap, label and filling dominate. A 2-cent cap difference is a 10 % swing on the unit price.
Questions We Get on This
How many ml is 4 oz?
About 118 ml; sold as 120 ml nominal.
What neck does a 4 oz bottle use?
24/410 for lotions, 38 mm for sauces.
Why is 4 oz still used?
US retail shelf conventions and existing moulds.
What is the MOQ?
1,000 pcs per colour.
Sizes That Fit This Guide
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