The fruit was never set if that's all the bigger it gets. Any type fruit tree does the same thing. Without pollination the fruit appears to set but stops growing at a small size and falls off.

Here's what I do for a tree that doesn't produce, grab the saw.

1. Plant a second Asian pear variety for cross pollination, wait for it to mature
2. Graft another variety or two to your tree and wait for maturity
3. Faster method to at least see if you pear is worth keeping - get some blossoming branches from another Asian pear and use them to hand pollinate the flowers from your tree. If that does not work, there is still that saw.

In fact, the first year my KG flowered, my 20th Century did not. I hand-pollinated KG with my friend's 20th Century's flowers. She has the same two trees.

They were the only two pears trees that flowered for a couple of years until Shinko started flowering (it got taken out last year for poor fruit quality).

Now I also have Hosui and other Euro pears.

I heard maybe zone 10 just don't have enough chill hours for my 20th century. But then again, why would it bloom with no chill hours met?

I am with Fruitnut and John. I fear that you may have a flowering pear tree, not the fruiting one.

Where did you buy it from?