☙

thước

In Vietnam, ? – 20ᵗʰ century, three units:

1) a unit of capacity for cereals, = 20 liters.

2) a unit of length, approximately 40 centimeters.

3) a unit of area, approximately 24 square meters.

In central Vietnam, 20ᵗʰ century, a unit of length, the thước may is approximately 62.5 centimeters and the thước moc, approximately 40 centimeters.

sources

thuóc : couado de medir : cubitus, i.

thước: côvado (a measure) : cubit, i.

Alexandro de Rhodes.
Dictionarivm Annnamiticum Lusitanvm et Latinvm…
Romæ: Typis, & sumptibus eiusdem Sacr. Congreg., 1651.
Column 785.

In Rhodes' orthography, the u and o characters in this word have hooks on the right side, like this word as typeset in 1651