Tools Needed:   Soft measuring tape (with mm units)  
1. Lay the tape flat  across the widest part  of your natural nail (from side edge to side edge).  
2. Press gently to follow the natural curve of your nail.  
3. Read the width  in millimeters (mm) where the tape meets the nail edges.  
4. Record each size  (e.g., Thumb: 14mm, Pinky: 9mm).  

⚠️ Critical Tips:   
- Measure all nails
- No gaps! Ensure the tape lies flush against your nail surface
- Between sizes?  Always round UP  (too big can be filed down; too small won’t fit).   

Tools Needed:  Tape + pen + ruler (with mm units)  
1. Stick tape over your nail bed across the widest part  of your natural nail (from side edge to side edge).  
2. Use a pen  to mark both side edges of your nail on the tape.  
3. Peel off the tape and lay it flat.
4. Measure the distance  between the two pen marks in mm.  

⚠️ Critical Tips:   
- Measure all nails
- No gaps! Ensure the tape lies flush against your nail surface
- Between sizes?  Always round UP  (too big can be filed down; too small won’t fit).