Maybe you ought to try Paul Hariot. Its small, its in my whiskey barrel this year and it blooms pretty well. Its in a partially shaded area and it still blooms.
I have Pink Beauty. I wouldn't call it a small lily, medium would be more accurate.
Rubra is another small one I really like but its a bit tempermental at times. I haven't exactly figured out why. Some years it blooms really well and others I'm lucky if it blooms once or twice during the summer. This year its blooming really well.
Its funny sometimes how certain lilies do well for others and not for some. I have Perry's Baby Red and it NEVER blooms.
Its about to get the boot from my tanks.
This pic shows a 1st day bloom on the right and an older bloom on the left.