Its depends on the size of a hand.
Michael phelps is a olympic legend and has broken 39 world records and has 8 olympic gold medals. His body proportions: Feet:14 Height:6"4 Arm span:6"7 Bicep size:15 inches Chest size:51 inches Michael phelps has hyperextended all his joints and muscles for better flexibilty and thats how he uses less movement in stroke to gain a higher speed. But michael phelps is a born swimmer with huge hands and feet so he is a perfect swimming organism. But in 2011 fina swimming championships michael phelps lost his 200m medley and other swimming events/styles to Ryan Lochte a 6"2 american who is the worlds fastest swimmer and broke the world record which was held by michael phelps whislt wearing the banned suit (increased speed and times). So proportions mean nothing its how hard you train and dedication to the sport.
Michael phelps
Hand span is the distance from the tip of your thumb to the tip of your little finger when your hand is outstretched completely.
The average hand span of a man is 3.5 inches across and 7.6 inches in length.
The size of a human hand , varies from person to person no matter what nationality you are.. However smaller , shorter people tend to have smaller hands than tall people. Heavy weight people also often have larger hands but not necessarily.
If I am correct about what you're asking, the average hand span is the same length as one's face.
For a standard size poodle, the life span is about 12 years.
hand span, arm span, foot, cubit
The average hand span of a fourteen year old is typically around 7 to 8 inches. Hand span can vary based on factors such as genetics, gender, and growth rate.
Sergei Rachmaninov is thought to have a hand span of almost 0.28 metres.
It is not a standard unit. So it can vary by individual hand.