Waveguide sizes
| 
 Frequency / GHz  | 
 Size in Inches  | 
 Size in mm  | 
 WG value  | 
 WR Value  | 
| 
 3.95 to 5.85  | 
 1.872 by 0.872  | 
 48.0 by 22.0  | 
 WG12  | 
 WR187  | 
| 
 4.9 to 7.05  | 
 1.59 by 0.795  | 
 40.0 by 20.0  | 
 WG13  | 
 WR159  | 
| 
 5.85 to 8.2  | 
 1.372 by 0.622  | 
 35.0 by 16  | 
 WG14  | 
 WR137  | 
| 
 7.05 to 10.0  | 
 1.122 by 0.497  | 
 29.0 by 13.0  | 
 WG15  | 
 WR112  | 
| 
 8.2 to 12.4  | 
 0.9 by 0.4  | 
 23.0 by 10.0  | 
 WG16  | 
 WR90  | 
| 
 10.0 to 15.0  | 
 0.75 by 0.375  | 
 19.0 by 9.5  | 
 WG17  | 
 WR75  | 
| 
 12.4 to 18.0  | 
 0.622 by 0.311  | 
 16.0 by 7.9  | 
 WG18  | 
 WR62  | 
| 
 15.0 to 22.0  | 
 0.510 by 0.255  | 
 13.0 by 5.8  | 
 WG19  | 
 WR51  | 
| 
 18.0 to 26.5  | 
 0.420 by 0.170  | 
 11.0 by 4.3  | 
 WG20  | 
 WR42  | 
| 
 22.0 to 33.0  | 
 0.340 by 0.170  | 
 8.6 by 4.3  | 
 WG21  | 
 WR34  | 
| 
 26.5 to 40.0  | 
 0.280 by 0.140  | 
 7.1 by 3.6  | 
 WG22  | 
 WR28  | 
| 
 33.0 to 50.0  | 
 0.224 by 0.112  | 
 5.7 by 2.9  | 
 WG23  | 
 WR22  | 
| 
 40.0 to 60.0  | 
 0.188 by 0.094  | 
 4.8 by 2.4  | 
 WG24  | 
 WR19  | 
| 
 50.0 to 75.0  | 
 0.148 by 0.074  | 
 3.8 by 1.9  | 
 WG25  | 
 WR15  | 
| 
 60.0 to 90.0  | 
 0.122 by 0.061  | 
 3.1 by 1.6  | 
 WG26  | 
 WR12  | 
| 
 75.0 to 110.0  | 
 0.100 by 0.050  | 
 2.4 by 1.3  | 
 WG27  | 
 WR10  | 
| 
 110.0 to 170.0  | 
 0.065 by 0.0325  | 
 1.7 by 0.82  | 
 WG29  | 
 WR7  | 
| 
 170.0 to 260.0  | 
 0.043 by 0.0215  | 
 1.1 by 0.55  | 
 WG31  | 
 WR4  | 
| 
 220.0 to 325.0  | 
 0.034 by 0.017  | 
 0.87 by 0.44  | 
 WG32  | 
 WR3  |