What was used as a unit of mass in the classical times?

carob seed
a drop of lead
handful of sand
swallow's egg
Carat, a unit of mass equal to 200 mg, is derived from a carob seed (Greek kerátion). People commonly believed that the seeds have unusually low variability in mass. Modern research denied this claim.
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Answers by country

carob seed
a drop of lead
handful of sand
swallow's egg
answers
flagAustralia
44%
11%
27%
16%
18
flagthe United Kingdom
42%
12%
34%
8%
49
flagUkraine
40%
7%
30%
22%
40
flagRussia
40%
16%
32%
12%
25
flagthe United States
39%
15%
33%
10%
103
flagCanada
35%
28%
28%
7%
14
flagGreece
33%
41%
16%
8%
12
flagUnknown
28%
28%
35%
7%
14
flagIndia
27%
18%
45%
9%
22
flagPoland
26%
13%
41%
17%
6011
flagGermany
14%
21%
57%
7%
14