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  • Nabil Hijazi thinks this is interesting:

point for extra small features, 2 points for small features, 3 points for medium features, 4 for large, and 5 for extra large.

From

Cover of Head First Agile

Note

1, 2, 3, 4, 5. T-shirt sizes are clear, when the shirts are placed next to each other - the size is clear. Not true of stories. This all assumes that the number of stories is very small. Where does architecture fit? Or does the high level design fit?