Breakdown of El dobladillo de mis pantalones se soltó y ahora necesito arreglarlo.
Questions & Answers about El dobladillo de mis pantalones se soltó y ahora necesito arreglarlo.
In Spanish, pantalones is normally used in the plural, just like trousers in British English or pants in English generally.
So you say:
The singular pantalón usually means one trouser leg in some contexts, or it may appear in fixed expressions, but for the item of clothing as a whole, learners should normally use pantalones.
Spanish often prefers noun + de + owner when it wants to be precise about what something belongs to.
So:
This sounds natural because the hem is a part of the trousers, not really a separate possession in the same way as mi libro or mi móvil.
You could theoretically understand mi dobladillo, but it would sound incomplete or odd here, because a dobladillo is usually the hem of something, so Spanish normally says what item it belongs to.