a half-size replica的用法和样例：
- Fit: This shoe fits a half size small. We strongly recommend ordering a half-size larger than your regular size.
- I have a half dollar but no small coins.
- The four and a half per cent bonds are in request.
- Her lips were parted in a half smile.
- It is only one pair of shoes in size six and a half.
- Full &half size package for PCB assembly.