By what criteria should I choose between S and M for the washed plain shirt?
The product description states that only size M can be worn as unisex, so a criterion is needed for deciding whether to wear it neatly or loosely.
S is an oversized silhouette tailored to the female body type, and M further extends the shoulders and total length so that both men and women can wear it comfortably.
The choice hinges on the note written directly below the size chart. For the french roast option of Moia's washed plain shirt, there is a notice that size M can be worn as unisex[1].
The difference between the two sizes lies in the shoulders and length. Size S has a shoulder width of 51cm and a total length of 73.5cm[2][3]. By women's clothing standards, it is a generous fit where the shoulder line drops naturally.
Size M goes one step further. Shoulder width widens to 52.5cm, and total length extends up to 76cm[4][5]. It is a size suitable for slim men to wear on its own, or for women to throw on casually like a light outer layer.
If you want a neatly falling silhouette, choose size S; if you want to drop the shoulder line further for a gender-neutral look or are looking for a shirt to share, choose size M.

Detailed measurements such as sleeve length or chest cross-section have not been confirmed yet.
Product measurements
View details
washed plain shirt (french roast)
Measurements
| Part | Value |
|---|---|
| length | 73.5cm |
| shoulder width | 51cm |
| sleeve length | 59.5cm |
| chest width | 59.5cm |
