Rings: Some rings in the Rebecca line are open shank and can be adjusted with a ring-sizer. They come in sizes from 9 to 20. Other Rebecca rings are closed shank and can be purchased in required sizes.
| Size | Internal diameter | External diameter |
| 10 | 15,92mm | 50mm |
| 12 | 16,56mm | 52mm |
| 14 | 17,20mm | 54mm |
| 16 | 17,83mm | 56mm |
| 18 | 18,47mm | 58mm |
| 20 | 19,11mm | 60mm |
Bracelets: all the bracelet measurements are in cm and include the length of the bracelet plus the clasp. Due to being handcrafted and not industrially manufactured, the measurements of the Rebecca jewellery may vary by a few mm.
Necklaces: all the necklace measurements are in cm and include the length of the necklace plus the clasp. Due to being handcrafted and not industrially manufactured, the measurements of the Rebecca jewellery may vary by a few mm.
Earrings: all the earring measurements on the website are in cm and include the entire length starting from the hook or fastener and width of the widest part. Due to being handcrafted and not industrially manufactured, the measurements of the Rebecca jewellery may vary by a few mm.
