A measuring tape is flexible and designed specifically for measuring body parts accurately for stitching garments.
Step 1: Analyze the options.
- Scale — Rigid, not suitable for body measurement.
- Measuring tape — Flexible and accurate.
- Compass — Used for drawing circles.
- Thread — Not a measuring tool.
Step 2: Conclusion.
Hence measuring tape is correct.
Final Answer:
\[
\boxed{(B) \, \text{Measuring tape}}
\]