The size guide for Giant City & Hybrid Bikes can be found on this page. The models included are the Giant Roam, Cross City, and Toughroad.
City & Hybrid
| Rider Height (cm) | ||||
| MODEL | S | M | L | XL |
| Cross City | 160-170 | 170-180 | 180-190 | 190-200 |
| Roam | 160-170 | 170-180 | 180-190 | 190-200 |
| Toughroad | 160-170 | 170-180 | 180-190 | 190-200 |