The ⚀trina·biqua·lengthel, or ⚀chambral·length

Quantitylength
Formal name⚀trina·biqua·lengthel
⚀trina·biqua·widthel
⚀trina·biqua·heightel 
Formal abbr⚀t•blgℓ
⚀t•bwdℓ
⚀t•bhgtℓ 
Colloquial name⚀chambral·length
⚀chambral·width
⚀chambral·height
⚀room·length
⚀room·width
⚀room·height
Colloquial abbr

⚀chb·lg
chb·wd
chb·hgt
⚀rm·lg
rm·wd
rm·hgt

Derivation⚀velocitel × ⚀trina·biqua·timel
Derivation abbr⚀veℓ × t•btmℓ
TGM equiv≈ unqua·Grafut
TGM equiv abbr≈ uGf
SI & USC equiv

= Ɛ7.6z|139.5d inch
= Ɛ.76z|11.875d foot
= 3.ᘔ6z|3.9583d yard
= 3.12497z|3.1d English ell
= 3543.3d millimeter
= 3.5433d meter 

scaling01:04:+:02:3.0

The ⚀trina·biqua·lengthel, or three ⚀ell·lengths, is a close approximation of the TGM unqua·Grafut, the first positive power of the Grafut.  This also makes it an approximation of a dozen USC feet. (It is exactly 11d feet 7½ inches USC.) This is on the order of the size of a typical room in a home.  Consequently, Primel suggests colloquializing this as the ⚀chambral·length, or  ⚀room·length.

See Also