Stealaneggs Size in Steal An Egg is a pet's weight in kilograms — a separate stat from rarity and mutation. It multiplies income through the size multiplier, and the egg it came from sets how big it can be. This guide to Steal An Egg pet sizes covers how that multiplier works and how to measure your own.
What is pet size in Steal An Egg?
Every pet card shows a weight in kg. That weight is the pet's size, and the wiki describes it as a trait rolled at hatch time, independent of the pet's rarity and of its color mutation. That is why the same pet can hatch plain but huge, or golden but small. Browse base incomes for all pets to see what each one starts from.
How does size affect income?
Size feeds straight into income through a multiplier:
Final Income = Base Income × Color Multiplier × Size Multiplier
Base Income is fixed per pet. The color multiplier comes from a mutation (1 if it has none). The size multiplier rises with weight. The wiki gives this formula for it, relative to the pet's hidden base weight — pending in-game verification:
Size Multiplier = (weight ÷ base weight)37/60, switching to (weight ÷ base weight)2/5 × 12513/60 above 125× the base weight, so gains per kilogram slow down.
Worked from that formula: 100× base weight ≈ ×17, 200× base weight ≈ ×24, 1000× base weight ≈ ×45. The base weight itself is not shown in game, which is why this guide explains the curve rather than listing a multiplier for each pet.
Do size and mutations stack?
They multiply rather than add. A ×2 size on a Golden (×2.5) pet gives ×5, not ×4.5. These are the color multipliers the wiki lists, pending in-game verification:
| Rainbow | ×3.5 | Normal hatch roll. |
| Parasite | ×3 | Not from normal hatch rolls; comes from its own Parasite Egg. |
| Fractured | ×2.75 | Not from normal hatch rolls; applied to an egg with a Mutation Consumable (10% chance). |
| Scrambled | ×2.75 | From Dr. Scramble's Shop; applied to an egg (10% chance). |
| Golden | ×2.5 | Normal hatch roll. |
| Spirit Bloom | ×2.5 | Sakura Incubator during the Cherry Blossom event; not currently active. |
| Bloom | ×1.25 | Tied to the Sakura event rather than normal hatching. |
| Silver | ×1.2 | Normal hatch roll. |
Does the egg's size matter?
Yes. In the wiki's words, the larger the egg, the higher the value multiplier applied to the animal inside it. The catch is weight: bigger eggs are heavier and slow you down on the run home, so a huge egg in a high biome needs more Speed than the listed requirement. See every nest in the egg list.
How do I check a pet's size?
Open the pet card and note two numbers: the weight in kg and the income per second. Do the same for another copy of the same pet. Because Base Income is identical for both, the heavier one's extra income is its size bonus. Keep a note of both numbers if you plan to trade.
Are there named size tiers like Small or Huge?
Players and some guides use names such as Small, Huge or Giant, and the wiki's own examples attach fixed multipliers to Giant and Huge. Those fixed numbers do not match the wiki's weight formula above, so the two sources conflict. Until size tiers are confirmed in game, this site does not publish a tier table or tier multipliers.
Why don't you list size multipliers?
Because a multiplier depends on a base weight the game does not show, and we only publish numbers we can source and date. You can measure your own instead:
Size Multiplier = Final Income ÷ (Base Income × Color Multiplier)
Read Final Income from the pet card, take Base Income from the pets list, and use 1 for Color Multiplier if the pet has no mutation. The pet value calculator runs the same formula forwards once you know the multiplier.
About this guide's data
Every fact on this page is listed below with its status and source. "Pending in-game verification" means a source states it but we have not confirmed it in game yet.
| Size is a weight in kg, rolled separately from color | Wiki — pending in-game verification | Steal An Egg wiki (Mutations) |
| Final Income = Base Income × Color Multiplier × Size Multiplier | Wiki — pending in-game verification | Steal An Egg wiki (Mutations) |
| Size multiplier formula and the 125× turning point | Wiki — pending in-game verification | Steal An Egg wiki (Mutations) |
| Bigger eggs hold more valuable pets and slow you down | Wiki — pending in-game verification | Steal An Egg wiki (Eggs) |
| Named size tiers (Small, Huge, Giant) and their multipliers | Not listed — sources conflict | Wiki examples vs wiki formula |
| Color mutation multipliers | Wiki — pending in-game verification | Steal An Egg wiki (Mutations) |
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