Size It Up #4 (October 30, 2026): answers and real sizes

Round 1: Paedophryne frog (smallest vertebrate) next to guppy

Paedophryne frog (smallest vertebrate) (Paedophryne amauensis): 7.7 mm · 0.3 in, adult, snout to vent (silhouette: Microhylidae). The reference, guppy, is 3.5 cm · 1.4 in long, so the paedophryne frog (smallest vertebrate) is 4.5× smaller. A guess between 7.3 mm and 8.1 mm scores 100; 3.9 mm or 1.5 cm scores 59. The hint window for this round was 3 mm to 2 cm.

Source: Wikipedia, Paedophryne frog (smallest vertebrate) · reference: Wikipedia, Guppy · silhouettes: PhyloPic (public domain; public domain)

Round 2: American lobster next to giant anteater

American lobster (Homarus americanus): 40 cm · 1 ft 4 in, adult, body incl. tail, claws excluded. The reference, giant anteater, is 2 m · 6 ft 7 in long, so the american lobster is 5× smaller. A guess between 38 cm and 42 cm scores 100; 20 cm or 80 cm scores 59. The hint window for this round was 30 cm to 1.5 m.

Source: Wikipedia, American lobster · reference: Wikipedia, Giant anteater · silhouettes: PhyloPic (public domain; public domain)

Round 3: European hedgehog next to mealworm beetle

European hedgehog (Erinaceus europaeus): 25 cm · 9.8 in, adult, head to tail base. The reference, mealworm beetle, is 1.5 cm · 0.59 in long, so the european hedgehog is 17× bigger. A guess between 24 cm and 26 cm scores 100; 13 cm or 50 cm scores 59. The hint window for this round was 8 cm to 40 cm.

Source: Wikipedia, European hedgehog · reference: Wikipedia, Mealworm beetle · silhouettes: PhyloPic (public domain; public domain)

Round 4: American bison next to guinea pig

American bison (Bison bison): 1.8 m · 5 ft 11 in, adult male, shoulder height. The reference, guinea pig, is 25 cm · 9.8 in long, so the american bison is 7.2× bigger. A guess between 1.7 m and 1.9 m scores 100; 90 cm or 3.6 m scores 59. The hint window for this round was 60 cm to 3 m.

Source: Wikipedia, American bison · reference: Wikipedia, Guinea pig · silhouettes: PhyloPic (public domain; public domain)

Round 5: Japanese spider crab next to three-toed sloth

Japanese spider crab (Macrocheira kaempferi): 3.7 m · 12 ft, adult male, leg span. The reference, three-toed sloth, is 55 cm · 1 ft 10 in long, so the japanese spider crab is 6.7× bigger. A guess between 3.5 m and 3.9 m scores 100; 1.9 m or 7.4 m scores 59. The hint window for this round was 1 m to 5 m.

Source: Wikipedia, Japanese spider crab · reference: Wikipedia, Three-toed sloth · silhouettes: PhyloPic (public domain; public domain)