thước kẻ 
ruler | Office and School Supplies | ruler | (Google translate:) cái thước | (Google translate:) Lineal |
| Size and quantity | Lineal + | ruler + | Weights and measures | A |
| Size and quantity | Maßstab + | scale, standard, ruler + | General | C |
| The office and computing | Lineal + | ruler + | Computing and typing | C |
[ thước ] : yard, meter, yardstick, ruler
[ kẻ ] : individual, single, person, man; to write (on a sign)
Most Common Compounds Set 1:
thước kẻ Most Common Compounds Set 2 :
Cô ấy dùng thước kẻ để vẽ thiết kế .
nữ tắc ruler of feminine education thước yard, meter, yardstick, ruler thước xếp a folding ruler vương bá powerful sovereign (monarch), emperor, king, ruler |
I need a ruler to measure the size of this piece of paper. 
Ich brauche ein Lineal, um die Größe dieses Papiers zu messen.