There is no plural indefinite article in English, and this is a situation that would take an indefinite article.
I have a large nose.
I have small ears.
I have ten fingers.
I have a broken leg.
Why the indefinite article? Here's the OED definition of a:
Used in an indefinite noun phrase referring to something not specifically identified (and, frequently, mentioned for the first time) but treated as one of a class: one, some, any (the oneness, or indefiniteness, being implied rather than asserted).
Emphasis mine. Roughly speaking, there are lots of large noses in the world, and the speaker in my first example is stating that they have one of them.
In certain contexts, the definite article might be appropriate, as Tᴚoɯɐuo mentions: when the characteristic being referred to is the only one in the set of people under discussion, such as when looking at photograph, or identifying a person in a room.
[Looking at a photograph] Q: Which are you? A: I'm the one with the large nose.
This only works because the answerer is the only person in the photograph with a large nose.
What if the photograph had several people with large noses, and several people with red hats, but the answerer was the only person with both? Indefinite articles.
A: I'm the one with a large nose and a red hat.
And if these were plural, we would use the plural indefinite if it existed, but since it does not, we use nothing:
A: I'm the one with a large nose and brown eyes.