Table 5: Nine essential features of shoes

      Yes   No   N/A
Essential Feature   Number   Percentage   Number   Percentage   Number   Percentage
1. Heel/sole height not exceed 3.8cm   491     99.4%     3     0.6%     0     0.0%  
2. Heel worn down to less than 1/2 the original heel height/size   335     68.0%     158     31.9%     1     0.1%  
3. Sole must be firm and have grooves   383     77.5%     111     22.5%     0     0.0%  
4. Crease line not excessive   257     52.0%     130     26.3%     107     21.7%  
5. Shoes have fastening features   199     40.3%     238     48.2%     57     11.5%  

6.

Toe box is similar to the outline of forefoot   243     49.2%     145     29.4%     106     21.5%  

7.

Stretchable material and allow air breathing   326     66.0%     65     13.1%     103     20.9%  

8.

There is no excessive bulging on the shoes   258     52.2%     129     26.1%     107     21.7%  
9. Stitches and junction are intact   424     85.8%     70     14.2%     0     0.0%