Dune Sandworm Length Comparison (Novel and Film)
Compare 14 Dune sandworm sizes: sandtrout 0.2 m, Leto II 7 m, captive 9 m, mouth 80 m, giants 400 m, Paul ride 2414 m. Novel and film figures in meters.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Sandtrout larva 0.2 m. Smallest row here. | 0.2 m (0.7 ft) | Encyclopedia, larval Little Maker | Dune Encyclopedia: sandtrout 20 cm |
| Old male width 100 m at widest point. Width, not length. | 100 m (328.1 ft) | Encyclopedia, old male width | Dune Encyclopedia: old male 100 m wide |
| Female worm 100 m long and 20 m wide. | 100 m (328.1 ft) | Encyclopedia, female length | Dune Encyclopedia: female 100 by 20 m |
| Leto II diameter 2 m. Text says more than 2 m. | 2 m (6.6 ft) | Leto II journals, body diameter | Herbert, God Emperor of Dune: Leto 2 m diameter |
| Juvenile worm 3 m. Early adult stage. | 3 m (9.8 ft) | Appendix I, six year juvenile | Herbert, Dune Appendix I: 3 m juvenile |
| Leto II body 7 m long. Keeps human face and arms. | 7 m (23 ft) | Leto II journals, body length | Herbert, God Emperor of Dune: Leto 7 m body |
| Ride rig width 7.32 m. 24 ft set piece. | 7.32 m (24 ft) | Villeneuve Part Two, rig width | Variety 2024: ride rig 24 ft wide |
| Stunted worm 9 m. Yields the Water of Life. | 9 m (29.5 ft) | Appendix I, stunted primitive | Herbert, Dune Appendix I: 9 m stunted |
| Captive worm 9 m. Kept stunted by water. | 9 m (29.5 ft) | Chapter 44, sietch captive | Herbert, Dune ch. 44: 9 m captive |
| Ride rig length 27.43 m. 90 ft set piece. | 27.43 m (90 ft) | Villeneuve Part Two, rig length | Variety 2024: ride rig 90 ft long |
| First mouth 80 m across. Mouth, not length. | 80 m (262.5 ft) | Paul first encounter, mouth diameter | Herbert, Dune: 80 m mouth |
| Recorded giant 400 m. Reliable witnesses baseline. | 400 m (1,312.3 ft) | Novel, recorded baseline | Herbert, Dune: 400 m worm |
| Old male length 400 m. Matches novel baseline. | 400 m (1,312.3 ft) | Encyclopedia, large male length | Dune Encyclopedia: male over 400 m |
| Paul ride worm 2414 m. About 1.5 miles. Approximate. | 2,414 m (7,919.9 ft) | Paul ride, more than half a league | Herbert, Dune: half league worm |
About this converter
Dune measures worms from larvae to legends. Sandtrout larvae run 0.2 m. Six year juveniles run 3 m. Leto II worm body runs 7 m long and over 2 m thick. The stunted Appendix worm and the sietch captive both run 9 m. The Encyclopedia lists females near 100 m long and 20 m wide, with large males near 100 m at the widest point. Paul first meets an 80 m mouth. Recorded giants pass 400 m in both the novel and the Encyclopedia. Paul rides a worm of more than half a league, about 2414 m. The Villeneuve team built a 90 ft ride rig, about 27.43 m long and 24 ft wide, about 7.32 m, as a practical set. One Paul ride worm equals about six recorded giants.
How to use it
Pick two entries and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try 1 recorded giant against Leto II to see how many god emperors one wild worm matches.
Length, mouth diameter and width are different measures, and rows pin which one in context. The half league ride is read as 1.5 miles or about 2414 m and flagged as approximate. The 90 by 24 ft rig is set size, not full worm length. The 450 m Yueh line traces to the 1984 film, southern pole giants lack novel cites, and the Polygon 9000 ft claim looks like error, so all three stay out.
FAQ
How long are large sandworms?
Over 400 m by reliable witnesses in the novel, matched by the Encyclopedia for large males. Larger ones may exist in universe.
How long was Paul ride worm?
About 2414 m, read as more than half a league or 1.5 miles. It is approximate and tops this table.
How big is Leto II?
About 7 m long and over 2 m thick at 3500 years, with human face and arms. This table lists him against wild worms for scale.
How big was the film ride rig?
90 ft long and 24 ft wide, about 27.43 by 7.32 m. It is a practical set for the ride scene, not a full worm.
Sources
- Herbert, Dune (1965): Appendix I Ecology, ch. 44 captive worm, 400 m baseline, 80 m mouth, half league ride
- Herbert, God Emperor of Dune (1981): Leto II journals on 7 m body
- The Dune Encyclopedia (1984) by McNelly: adult male, female and sandtrout entries
- Variety 2024-03-04: Villeneuve Part Two ride rig 90 by 24 ft (Vermette)
Last verified: 2026-10-01 · 14 entries
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