Study of lemon slice
Most of my painting time is taken up with teaching composition the last few weeks. Working out the compositions, shopping for fresh replacements of eggs, fruit, etc. ....and hauling everything to and from class....exhausting! Well worth the personal discoveries I see my students making, though.
This still-wet study is approximately life size of the actual lemon slice. I think, to explore the subtle color variations, you need enough room for your brush to make a color statement.
Fingernail sized fruit, flowers, vegetables, etc. fail to entertain.