I can honestly tell you I don't think the size of your breast has anything to do with it. I have small breast that never grew, changed or even produced milk until four days after both my girls were born. They never got any bigger and you would not have known I was nursing. I never changed bras or anything.
I can tell you I was not able to pump. I don't know if I was using the wrong size plastic cup for my breasts after both pregnancies but I couldn't pump. I would sit for twenty minutes and get 2 oz of milk. Not quite worth my time in my opinion.
I did nurse both my girls for a year. They never lost weight and were chubby, healthy babies. Sometimes it felt like I wasn't producing enough because the oldest always wanted to nurse. She just used mommy as a pacifier and I was too green to know better....had nothing to do with milk production and how much she got when she nursed. She was a baby that stayed off the charts from birth until she was almost four years old.
I am due in a few weeks with number three (a boy). This time my breasts have grown some. They aren't leaking milk like some women do. I imagine I won't produce any milk until a few days after he's born like I did with the girls. The colostrum will be sufficient and I will supplement with one bottle a day even after my milk comes in because I want to be able to give him a bottle when I need to. I made the mistake of not giving my second child a bottle for three weeks until I went back to work part-time at night and she refused to take a bottle. It worked out because I would feed her before I left the house and she would just wait for mommy to get home four 1/2 hours later.
At any rate I'm guessing you are asking because you might consider trying with the next child if you decide to have one. I would strongly recommend it. Your breast size is not an issue. It has no bearing on your abilitiy to nurse a child.
And stop fretting about the first. Circumstances had it that you weren't able to. It's over and done with. I'm sure the little one is still healthy as can be regardless of being nursed or not. If you didn't even have him for 10 days I would think you had started to dry up anyway. Who knows and it isn't worth worrying about.
I hope you decide to have another and if you do try breastfeeding if you can. It is a good experience. It isn't easy, but it is rewarding if you can get through the first couple of weeks. If you can't, then don't beat yourself up about it. Your baby will be healthy regardless.
Good luck and God Bless!