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Human Hand Bones - Thumb

by siderits, published

Human Hand Bones - Thumb by siderits Jan 15, 2012
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27185Views 15558Downloads Found in Biology


This project used a Next Engine Laser scanner and was undertaken in association with the Pittsburgh Supercomputing Center and the Center for Parabiotics Research.

Modify these files for example create a void space for an embedded sensor or attachment points for ligaments and tendons. Place a channel down the center for wiring or even lighting.

See blue image for example of modified file. Tip recess for sensor with attachement points for ligament and muscle wires.


Printed with Up3D! printer (you may need to scale individual files if they don't look correctly sized). You can find average hand bone sized several places on the web.

01 SCP- Scaphoid
02 LUN - Lunate
03 TRQ - Triquestrum
04 PIS - Pisiform
05 TRP- Trapezium
06 TRZ -Trapezoid
07 CAP -Capitate
08 HAM - Hammate

11 3MC - Third Metacarpal
12 4MC - Fourth Metacarpal
13 5MC - Fifth Metacarpal
14 PP - Proximal Phalange 1,2,3,4,5 fingers
15 MP - Middle Phalange 1,2,3,4,5 finger
16 DP - Distal Phalange 1,2,3,4,5 fingers

Image reference: http://home.comcast.net/~wnor/lesson5palmofhand.htm

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A couple notes from trying to print this:

  • 2MP_repaired.stl is a copy of 2MC_repaired.stl. Instead you should use 2MP_Backup.stl.
  • 4PP_repaired is a missing file. I simply copied 3PP_repaired.stl and scaled it to size. Not ideal but good enough.
  • 1MC_repaired is missing. This is because 1PP should be 1MC and 1MP should be 1PP. Thumbs don't have a middle phalange, so 1MP shouldn't exist.
  • The sizes when I import all scale them to 8mm high. For scaling I've included a chart that I prepared using a hand I bought off Amazon.
  • I have yet to print the wrist bones but will attempt to include a chart here once I scale them.

I don't know if anyone is following this project but it doesn't hurt to ask. I was able to find the sizes of the finger bones pretty easily. The Wrist bones are another matter. Is there any hope as to what scale they are, Approximate size, A link to a web page, anything. I am now guessing and printing and trying to see if they look right. This is a very time consuming process. Any help would be appreciated.



Hi, this is great work. Well done. I just wanted to check, you say some of the files may not be in proper proportion to the other files? ie one bone may not be the correct size of the bone next to it so i will have to resize in the print program? Also is the 4PP there?? Cheers

Hi could you please upload the 4PP? thanks

Try 2MP backup, its in the file list.
Let me know.

Thank you so much!! 2MP backup file works. May I ask for a 4PP file if you don't mind?? I think it is missing from file lists. Anyway, Thank you so much again.

Thank you for your work. I think 2MP_repaired and 2MC parts are same parts, maybe 2MP_repaired file is wrong. Can i get the 2MC_repaired file?? and also 4PP is missing...

I adapted some of these model files for a Halloween costume: https://youtu.be/-UU-cQqQYIA

Hello Siderits,

Thank you for replying to my last question. Actually I got a really small model. Can you please share with me the hand bones skeletal data, the real ones as i need them in the process of making the hand prosthetic hand project we are working on. many thanks, Cheers.

Hello guys !

Thanks first for the 3D data, its really helpful, its just now im stuck as i dont have the data for the index metacarpal...can you please unpload it ... thanks in advance.

Sorry, I uploaded 2MC.STL.

Got it, Thank you sooooo much

Hi There!

I downloaded your model last night and although I'm not an anatomy expert I think that the metacarpal bone of the second finger is missing, is it possible or I'm wrong?

Thanks in advance!


Sorry, I uploaded 2MC.STL.

For sizing - here is a reference from PubMed on the average dimensions of the trapezium ("...In the cadavers, the mean length, width and height of the trapezium were 22.8, 15.5 and 15.2 mm.") You can use these dimensions and scale the Trapezium file, then adjust all of the others equivalently.


Sorry, I uploaded 2MC.STL.

Hi. Thank you for the great model. I have a problem with the sizes. when I open each of the parts in cure, they all have a height of 0.8mm.
Their aspect ratio is not right. Is something wrong with my software setting?

Sorry, I uploaded 2MC.STL.

I think you just need to scale up by a factor of 10.
I did the scan in mm but made the STL in CM.
My best;

Thank you! I have been creating bone models for teaching hand anatomy!

Sorry, I uploaded 2MC.STL.

hello!! very nice files!!! i would like to know where did you take those bone structures from, mri or something like that? i want to work with it but i have to know where did it came from.. i´d really apreciate your help.

Scznned anatomy specimen, scale up by 10

I think some of these files may be mislabeled. I printed the 2 PP and it turned out to be the 2 MC

Sorry, I uploaded 2MC.STL.

You don't need to say it is free for use with robotics projects, that is already covered by the CC -by-sa licence you published this thing with. Or did you mean that it is not free for use in projects other than robotics?