How many new styles could I add?

Estimate new regular styles and repeats before opening more independent boxes from one series.

Published by The Doll Scout · Sources checked: 2026-10-02

Example values are hypothetical, not brand odds or current prices.

Enter your own values, or try the labeled example below.

Calculation method

If K regular styles share probability 1 − s equally, and h different regular styles are owned, expected new styles from n independent boxes are (K − h) × [1 − (1 − (1 − s)/K)^n]. Repeats = expected regular draws minus new styles. Secret outcomes remain separate. Fractional results are averages across repeated experiments.

Worked example: 6 equally likely regular styles, 4 already owned, 6 independent boxes and no secrets produce about 1.33 new regular styles and 4.67 regular repeats on average.

These models do not describe sealed no-repeat cases, POP NOW hints or changing probabilities. Unknown rates should stay unknown. Never copy a rate from another brand or release.

Collecting field guide

Practical answers with worked examples, explicit limits and sources you can check.

Which blind-box probability model fits?Use independent-draw math only when each box has the same chance and previous outcomes give no information about the next one.Check a toy retailer before payingBegin with the official regional store or directory, then verify the exact seller and item. Product photos and a familiar logo do not establish authorization.Measure a display that actually fitsUse the empty inside space and the full outline of the object in its intended pose. Outside box dimensions and nominal toy height are not enough.Start a collection you can keep enjoyingChoose a small theme, a spending limit and a place to display it. A clear wish list is more useful than treating every new release as a missing piece.