How do human bone models select sizes?

When it comes to choosing the size of the bone model, many people talk to me about it, and they take out the ruler, and they look at it like they're measuring clothes. It's actually a little more complicated than buying shoes.——As long as the shoes are right, the rest are comfortable; the skeletal models, in addition to "long," have to look at "width flexibility" and "show demand."

Look at the eyes. Don't be blind.

把表格摆在桌子上，先对照孩子的身高，挑个“相近”但又留点余地的。比如一个身高 150 cm 的学生，65 cm 的模型看着会显得有点“矮”，而 85 cm 正好能把细节展现得更清楚。

Key points. Don't focus on numbers.

• The joint can be removed.: If the model can be de-assembled on its own, slightly larger sizes are not afraid to occupy the floor, it can also be shown.
• Material thickness: The thinness of plastics has a direct impact on the weight, and the slight weight is more stable in the model hand, but it is tired of moving around.
• Showspace：教室角落只有一块小台子，120 cm 的模型直接把台子压扁；这时候小一点的更省事。
• BudgetThe larger the size, the higher the cost. A list of the budget would be useful to see whether the money was spent on sizes or whether it would be more cost-effective to buy accompanying teaching accessories.

It's real. It's the best.

上周我看到一位老师带着孩子们去文具店挑模型，孩子们围着 85 cm 的模型转了一圈，手指点着膝盖说：“这跟我腿一样长”。老师笑着把模型搬到教室门口，让全班同学站在旁边比对。结果发现，模型略高出孩子们的实际膝盖大约 2 cm，正好能看到关节内部结构，却不至于让人觉得“巨无霸”。这场“现场实验”让老师立马决定买下这款。

小技巧：把模型放在地上，用一根绳子量出模型从脚底到头顶的距离，再和孩子的身高做个比例，差不多在 1:1.8 左右的比例，视觉效果最自然。

Don't forget, sizes aren't all done once. New teaching materials have been changed during the semester, or they may have to be presented to another grade. Put "removable sizes" on the list of purchases so that we don't have time for this.

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So, the skeletal skeletal model is the same as the clothes.——It's comfy, comfortable, showable. As long as three points of height, joint demand and classroom space are balanced, the size is naturally not under the word. It's up to you.