Where it fits
This model is classified as Mid Length. Use the documented family, selected size and intended conditions to decide whether that direction matches the surfer's brief.
Mid Length
Lost Double Up
The Double Up by Lost Surfboards is a domesticated Big Wave Board. With a forward outline and a wider than normal nose for your...
Official manufacturer information
Typical surfer profile
Beginner to Expert surfer seeking a mid length.
Wave direction
The available board information associates this model with point break, open face, reef break. Confirm the intended wave range with the manufacturer.
Where it sits in the design range
The Double Up sits in the Mid Length family with a Mid Length direction. Related models may solve a different design job even when their volume is similar.
Dimensions and volume
Available size range
5'10 to 7'6, 25.8L to 43.8L across the reviewed board specifications. The table below shows the complete available size range.
| Length | Width | Thickness | Volume | Construction |
|---|---|---|---|---|
| 5'10 | 18 3/8 | 2 1/4 | 25.8L | PU |
| 6'0 | 18 1/2 | 2 1/4 | 26.8L | PU |
| 6'10 | 19 1/2 | 2 9/16 | 35.9L | PU |
| 6'2 | 18 1/2 | 2 5/16 | 28.3L | PU |
| 6'4 | 18 3/4 | 2 3/8 | 30.2L | PU |
| 6'6 | 19 | 2 1/2 | 32.8L | PU |
| 6'8 | 19 1/4 | 2 1/2 | 34.2L | PU |
| 7'0 | 19 1/2 | 2 5/8 | 37.9L | PU |
| 7'2 | 19 1/2 | 2 5/8 | 39L | PU |
| 7'4 | 19 3/4 | 2 5/8 | 40.5L | PU |
| 7'6 | 20 | 2 3/4 | 43.8L | PU |
Board design direction
- Public family
- Mid Length
- Detailed category
- Mid Length
- Also suits
- step_up
- Ability guidance
- beginner, progressing, intermediate, advanced, expert
- Fin configuration
- Single, 2+1, Twin, Two Plus One
- Wave intent
- point break, open face, reef break, average, weak
- Strengths
- glide, paddle, wave entry
- Trade-offs
- release, sensitivity
Guidance describes board characteristics, not a guaranteed performance outcome.
Board DNA
A compact view of how this board is designed to behave. Live stock and sizing remain the main purpose of this page.
- Paddle
- 9 / 10
- Speed
- 7 / 10
- Drive
- 7 / 10
- Release
- 5 / 10
- Hold
- 7 / 10
- Forgiveness
- 8 / 10
- Sensitivity
- 5 / 10
- Outline
- curvy
- Rocker
- medium low entry / medium low tail
- Rails
- medium
- Quiver role
- mid length, cruiser, point break
Quivrr Board DNA is derived from current manufacturer design information and governed Quivrr classification.
Check current regional availability
Stock is not baked into this page. Choose a region to run a current Quivrr search.
Other boards in this family
Related design guidance
How to choose a surfboard, understand volume and sizing, or ask Bodhi to explain trade-offs.
Reviewed by QUIVRR editorial on 2026-07-14. Board information updated: 2026-08-19. Confirm final specifications with the manufacturer or retailer.