openSNP

http://www.topendsports.com/testing/tests/hand-span.htm

I suggest listing dominant hand first, so right handers;

Rxx.x Lxx.x

and lefties;

Lxx.x Rxx.x

Phenotype	Number of Users
Atypical Sulfonomide Antibiotic Reaction	66
Are You The Advertising Phenotype?	64
Negative reaction to fluoroquinolone antibiotics	73
Digit ratio	28
Chronotype - Morningness-eveningness questionnaire (MEQ)	92
Ectopia Lentis	65

User	Variation
Anaro Lexnon	R19.2 L18.8
Oceangirl	R23.2 L22.9
ett-1	R19.0 l19.0
JMN	small hands about 7.5" both sides
atelepen	Small hands about 7.5" both sides
Pamela	R21.L22
rs4680	R24.1 L24.2
Charity	Small hands about 7.5" both sides
Viking Queen	Small hands about 7.5" both sides
Ettences von Vagaverphery	R21.l22
Morgan Johnston	R22.3 L21.5
itschac	R19.0 l19.0
Clara Joyce Schaeffer Miller	Small hands about 7.5" both sides
John Roberts	R23.7 l24.0
PoisonIvy	R 7 1/2 in L 7 3/4 in
Phyllis Heffner	6.5" both sides
Karen Kusmez	R24.1 l24.2
Vivek	R 9 3/4 in \| L 9 7/8 in
lonewolf	dont know but i wear a size 16 ring
Kelly Neff	6.5" both sides
randy	Dont know but i wear a size 16 ring
Melissa	Small hands about 7.5" both sides
Namu	R6.3" L6.3"
E.K. Blue	Small hands about 7.5" both sides
meili telese	6.5" both sides
Daniel C. Henklein	R21.5 L23
Jason Wallace	R24cm L24cm
trurl66	R21.5 L22
C. Carolus MacPherson	R 8.8 in, L 9.0 in
Laura Harden	7.75" both sides
Ray Miler	R22.8 L22.2
BP508	R24.5\|L24.5
Anneke9	6.5" both sides
Marci	Small hands about 7.5" both sides
Rosemarie Russell	7.75" both sides
John A Kuehn	R21.5 l22
robynb	L 9" R 9"
C.E.M. Barbman	Small hands about 7.5" both sides
matis	R22.0 L22.3
Kristen L. Ramsay	unknown
William Hart	R21.6 L22.2
Carlee	R09.0" L09.0"
B	7.75" both sides
Duane Kaufman	R23.2 l22.9
Audrey Burns	Small hands about 7.5" both sides
DemonRaven	Small hands about 7.5" both sides
ckova	r 22 l 22
billy ross iii	Small hands about 7.5" both sides
Klevine	R23.2 l22.9
Carlan	L 9" r 9"
R-BY86444	R23.7 / 24.0
otis	Unknown