Is it possible to get pregnant a woman if she have a very small egg cell? in comparison a normal egg cell would be like a size of an ostrich but what if it was a size of a quil egg?

The size varies in terms of fertility. The larger the size of the fertilized egg, the chances of the fertilization higher compared to eggs that are relatively smaller. Sperms are vessels of DNA with enough nutrients to penetrate the eggs.

Don't think the size of the egg matters what is important is for it to be fertile so the sperm n the egg can fuse for an embryo to b present