Compare nearby sizes
If two models look close, look at which measurement actually differs. In the MonthlyCup chart, Normal and Plus share listed cup and total length, but differ in diameter and capacity.
Size chart explained
Read a cup size chart without guessing.
A size chart should reduce confusion, not create a new rulebook. Here is how to read diameter, cup length, total length and capacity in a grounded way.
Read the units
Millimetres describe shape. Millilitres describe capacity to a stated point.
The four columns
What each number tells you.
Diameter is the width of the cup. Cup length describes the cup body without relying only on the stem. Total length includes the full listed length. Capacity to the holes describes the stated volume up to the cup’s holes in the MonthlyCup guide.
The numbers are comparison tools. They do not guarantee fit, and they should be considered with flow, preferences and the product instructions.
Better chart reading
Do not jump straight to the biggest or smallest model. First decide which measurement you are comparing and why it matters for your routine.
| MonthlyCup model | Diameter | Cup length | Total length | Capacity to holes | How to interpret |
|---|---|---|---|---|---|
| Mini | 37 mm | 45 mm | 55 mm | 15 ml | The smallest listed diameter and shortest listed cup length in this model set. |
| Normal | 43 mm | 55 mm | 65 mm | 22 ml | A middle listed diameter with the same listed cup and total length as Plus. |
| Plus | 47 mm | 55 mm | 65 mm | 43 ml | The largest listed diameter and highest listed capacity in this model set. |
Fit is not a formula
Why the chart is a guide, not a guarantee.
MonthlyCup’s guide advises comparing measurements, flow and preferences. It also states that age or childbirth alone are not a size rule and that no model is guaranteed to fit everyone.
Check capacity wording
Capacity can be measured to different points. The MonthlyCup guide states capacity to the holes, so keep that wording attached to the number.
Keep instructions nearby
Size is only one part of use. Emptying, removal and care instructions still need to be followed for the product you choose.
FAQ
Size chart questions.
What does capacity to the holes mean?
In the MonthlyCup model guide, the listed capacity is stated up to the holes of the cup. The wording matters because capacity figures can otherwise be compared imprecisely.
Is the Plus model longer than Normal?
According to the published MonthlyCup guide, Normal and Plus both list cup length 55 mm and total length 65 mm. They differ in diameter and capacity.
Is Mini always for younger users?
No such rule is stated here. MonthlyCup’s guide advises that age or childbirth alone should not determine cup size.
Can a size chart guarantee the right cup?
No. The chart helps comparison, but MonthlyCup states that no model is guaranteed to fit everyone.