How it surfs
Rob Machado's own published description is the clearest guide to sizing. He rides both the 5'6" and the 7'0", and says the 5'6" carries about six liters more than his usual shortboard. Every retailer that carries the model repeats the same instruction: size up and do not be shy about it.
Surfboard Factory Hawaii recommends the Sunday in one to four foot surf, skewing towards poor to average conditions, and notes it can be pushed into quality waves depending on the size you ride. If you already own a mid-length, the Sunday's pitch is versatility rather than glide alone. Compare it against the Channel Islands CI Mid and the Firewire Greedy Beaver before choosing.
Volume & sizing chart
Use the chart below as a starting point. Add half a litre if you are less experienced, subtract half a litre for a looser feel.
| Size | Volume | Rider weight | Best for |
|---|---|---|---|
| 5'6" | 31.22 L | Size up from your shortboard | Experienced |
| 5'9" | 34.66 L | Size up from your shortboard | Experienced |
| 6'0" | 38.32 L | Everyday size for many surfers | Intermediate |
| 6'4" | 45.11 L | Everyday size for many surfers | Intermediate |
| 6'8" | 48.06 L | Weak-wave and cruise size | All levels |
| 7'0" | 53.76 L | Weak-wave and cruise size | All levels |
| 7'3" | 56.66 L | Maximum glide | All levels |
How it compares
| Board | Best at | Wave range | Aggregate score |
|---|---|---|---|
| Firewire Greedy Beaver | Compressed longboard outline | Waist to head-high | 8.0 |
| Channel Islands CI Mid | Modern egg mid-length | Waist to overhead | 9.2 |
| Harley Ingleby Mid 6 | Performance mid-length | Waist to head-high | 9.0 |
Recommended fin setups
- Single fin setup — Retailer copy: ride it as a single fin to draw out turns and flow.
- Twin fin setup — Retailer copy: set it up as a twin if you want to liven it up.
Verdict
One outline covering 31 to 57 liters is the whole argument for the Sunday. Published sources agree on what it is: a cruisey, versatile Machado hybrid best bought two or three sizes above your shortboard instinct. No numeric scores are published for it, so the rating here is an estimate from specification and consistent retailer positioning.
