ขนาดของเหล็กเพลาเหลี่ยมมาตรฐาน
| NOMINAL SECTIONAL DIAMETER | WIDTH | WIDTH | |
| (kg/m.) | (kg./piece) | ||
| mm. | in. | 6m. | |
| 4.5 x 4.5 | 3/16 x 3/16 | 0.17 | 1.07 |
| 6 x 6 | 1/4 x 1/4 | 0.31 | 1.09 |
| 8 x 8 | 5/16 x 5/16 | 0.49 | 2.96 |
| 9 x 9 | 3/8 x 3/8 | 0.71 | 4.27 |
| 12 x 12 | 1/2 x 1/2 | 1.26 | 7.59 |
| 15 x 15 | 5/8 x 5/8 | 1.97 | 11.86 |
| 19 x 19 | 3/4 x 3/4 | 2.84 | 17.08 |
| 22 x 22 | 7/8 x 7/8 | 3.87 | 23.24 |
| 25 x 25 | 1 x 1 | 5.06 | 30.36 |
| 32 x 32 | 1 1/4 x 1 1/4 | 7.9 | 47.44 |
| 38 x 38 | 1 1/2 x 1 1/2 | 11.38 | 68.28 |
| 45 x 45 | 1 3/4 x 1 3/4 | 15.49 | 92.94 |
| 50 x 50 | 2 x 2 | 20.24 | 121.44 |
| 56 x 56 | 2 1/4 x 2 1/4 | 25.62 | 153.72 |
| 65 x 65 | 2 1/2 x 2 1/2 | 31.62 | 189.72 |
| 75 x 75 | 3 x 3 | 45.54 | 273.24 |
| 90 x 90 | 3 1/2 x 3 1/2 | 61.98 | 371.88 |
| 100 x 100 | 4 x 4 | 80.96 | 485.76 |
| 112 x 112 | 4 1/2 x 4 1/2 | 102.5 | 615 |
| 125 x 125 | 5 x 5 | 126.5 | 759 |
