ALL ANSWERS · INSECTS · DAILY No. 16 · SEPTEMBER 19, 2026
Size It Up Insects answer: September 19
The five Insects silhouettes for September 19, with the true sizes. If you have not played yet, this page is a spoiler — play these five first, then come back to argue with the numbers.
Day 16 ran from a human flea (1.95 mm) to a blue morpho (14 cm). The widest gap was round 5, Japanese Rhinoceros Beetle against Common Fruit Fly, at 22×; the closest call was round 3, Human Flea against Red Flour Beetle, only 1.8× apart — the kind of round that separates a 90 from a 60.
SPOILER · TODAY’S FIVE
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ROUND 1
European Hornet (large adult) vs Click Beetle (adult)
Click Beetle · reference · 8.9 mm European Hornet · true length · 3.5 cm 3.9× longer than the click beetle
European Hornet: 35 mm body length for the selected large adult. Published upper length 35 mm; a large adult, not a typical worker. Head to abdomen tip; wings, legs and antennae excluded.
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ROUND 2
Peacock Butterfly (adult · open wings) vs Blue-tailed Damselfly (adult · body length)
Blue-tailed Damselfly · reference · 3.1 cm Peacock Butterfly · true wingspan · 6.9 cm 2.2× wider than the blue-tailed damselfly
Peacock Butterfly: 69 mm wingspan for the selected adult. Selected 69 mm within published wingspan 63–75 mm. Furthest left to furthest right wingtip with wings spread.
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ROUND 3
Human Flea (adult) vs Red Flour Beetle (adult)
Red Flour Beetle · reference · 3.45 mm Human Flea · true length · 1.95 mm 1.8× shorter than the red flour beetle
Human Flea: 1.95 mm body length for the selected adult. Selected 1.95 mm within the published adult range 1.5-4 mm. Head to abdomen tip in side view; bristles and legs excluded.
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ROUND 4
Blue Morpho (adult · open wings) vs American Cockroach (adult)
American Cockroach · reference · 4 cm Blue Morpho · true wingspan · 14 cm 3.5× wider than the American cockroach
Blue Morpho: 140 mm wingspan for the selected adult. Selected 140 mm within the published adult wingspan of 5-8 inches (127-203 mm). Furthest left to furthest right wingtip with wings spread; antennae and legs excluded.
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ROUND 5
Japanese Rhinoceros Beetle (male · horn included) vs Common Fruit Fly (adult)
Common Fruit Fly · reference · 2.5 mm Japanese Rhinoceros Beetle · true length · 5.5 cm 22× longer than the common fruit fly
Japanese Rhinoceros Beetle: 55 mm length including horn for the selected male. Selected 55 mm within the published male range 40-80 mm. Horn tip to elytra tip; the male's head horn is included, antennae and legs excluded.
Beat these tomorrow
Every round is worth up to 100 points: within 6% of the true size scores 100, half or double scores 45, five times off scores zero. The daily puzzle is the same five for everyone and refreshes at midnight in your time zone; if you want more than five, Size It Up Unlimited draws fresh pairs from the whole library for as long as you like.