I'll have to look up what 24 gauge means, we don't use that measurement here... ok, it's approx 1.3 mm diameter, a little thinner than I use, and a small difference in wire thickness can make a big difference in how it feels in a puppet.
Here's a US source for the soft aluminium wire, in various sizes, shown as gauges millimetres, and : http://www.whimsie.com/aluminum%20craft%20wire.html?gclid=CJSi4bjR6...
Here is what I used for a 5" to 7" tall figure.
Legs: 1.6mm (1/16th" diameter, or 14 gauge) wire, 2 strands. Same for neck.
Spine: 4 strands, 2 of the strands from the legs and another piece doubled over to make 2 more strands.
Arms - 2 or 3 strands of 1.6mm (1/16th", 14 gauge) wire. I joint in the forearm to a thinner wire, 1mm, for hands. Each finger has 2 strands, twisted together.
Here's the 5" figure and the first part of how I made it:
You could go up to 2mm wire maybe, but I usually use that for 8" to 10" figures. It is probably a bit stiff for 6". And for 12" tall puppets I use 3mm (1/8th") wire in the legs and spine.
Here is the 5" puppet, and a taller one (maybe 6 1/2") made the same way, in action. They are both very easy to animate, with plenty of support but not too stiff: https://www.youtube.com/watch?v=ROTaV3mkQR4