Deunydd | Pren | Pren | Pren | Pren | Pren | Pren | Pren | Pren |
Rhedeg Rhif. | 2*2 | 2*3 | 2*4 | 2*5 | 2*6 | 2*7 | 2*8 | 2*9 |
Uchder (cm) | 0.5 | 0.75 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.25 |
Pwysau (kg) | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
Cludo llwyth (kg) | ||||||||
Nifer / blwch |