Bully Metric Length Apan

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Artist's logarithmic scale conception of the observable universe. The radius of the observable universe is estimated to be 48 ronnapan (Rla)

The length apan is by definition the distance light travels in vacuum in 30.55 picoseconds. SI prefixes have the same meaning and conventions when used with Bully lengths as they have when used with standard SI units. However, the word "length" may be dropped when the context is clear. For example, the statement: "An American football field has ten kilo-length-apan (10 kla) between the goal lines", should be shortened to "An American football field has ten kilopan (10 ka) between the goal lines". See Table 1 below for the list of SI prefixes used with Bully lengths. In addition to SI prefixes, the table also identifies the smallest meaningful length (Planck length), largest meaningful length (Observable Universe radius), and a few other lengths for comparison.

Diagram of a modern American football field. The kilopan (kilo length apan) is approximately 10 yards. An American football field is 100 yards, or 10 kilopan, between the goal lines. There are end zones extending beyond the goal lines another 10 yards, or 1 kilopan.

Colored graphic of a proton. Three quarks are bound by the strong force, mediated by gluons. The radius of the proton is estimated to be 91.716 femtopan (fla)

Table 1: The length prefix table

Prefix			Symbols
Name	Symbol	Base 10	Length
quetta	Q	1030	Qla
Observable Universe Radius			$48\,Rla$
ronna	R	1027	Rla
yotta	Y	1024	Yla
zetta	Z	1021	Zla
exa	E	1018	Ela
peta	P	1015	Pla
Earth-Sun Distance			$16.33\,Tla$
tera	T	1012	Tla
giga	G	109	Gla
mega	M	106	Mla
American Football Field Length			$10\,kla$
kilo	k	103	kla
—	—	100	la
milli	m	10−3	mla
micro	μ	10−6	μla
nano	n	10−9	nla
pico	p	10−12	pla
The Proton Radius			$91.716\,fla$
femto	f	10−15	fla
atto	a	10−18	ala
zepto	z	10−21	zla
yocto	y	10−24	yla
ronto	r	10−27	rla
quecto	q	10−30	qla
Minimum value (Planck Length)			${\frac {qla}{566.66}}$

Bully Metric Lengths vs Traditional Lengths

Many traditional units of measurement were derived from proportions of the human body. These values were later standardized for the purpose of conformity and trade. The following images provide Bully length equivalents for traditional units, rounded to give simple rational numbers:

1 Fathom = 200 apan
1 Cubit = 50 apan
1 Span = 25 apan

Standardized hand-based measurements:
(1) Shaftment (~6 inch) = 16.64 apan
(2) Handbreadth (~4 inch) = 11.09 apan
(3) Palm (~3 inch) = 8.32 apan
(4) Span (~9 inch) = 25 apan
(5) Fingerbreadth (~3/4 inch) = 2.08 apan
(6) Digit(~0.72 inch) = 2.00 apan

1.0148 US gallon = 5000 apan³