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Office & Industrial

Sailor Fountain Pen, Desk Pen, Black, Extra Fine Point, 12-0073-020

Office & Industrial4.5· 120 Amazon ratings

Bias-adjusted across 120 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Office & Industrial.

75.0%
Percentile · Global
61.9%
Percentile · Cohort
Office & Industrial
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Sailor Fountain Pen, Desk Pen, Black, Extra Fine Point, 12-0073-020

How the score was built

Amazon ratings
120

used for the Bayesian percentile

Raw star average
4.5 / 5

unadjusted Amazon mean

Bayesian avg
4.41

raw rating shrunk to the category prior

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Same category · Office & Industrial

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