You already know SIR rates by expansion. This page answers a different question: which sealed format should you open for the same chase. Same set, different pack counts, so SIR hit rate and cost per expected SIR change. Use it before you pick an Amazon.com box.
In this article
On a typical Mega Evolution set, the rateTCG slot model puts Special Illustration Rare near 4.5% per pack (any SIR in the set, not a named chase). A 36-pack display (~81% chance of ≥1 SIR, ~1.6 expected SIRs) clearly beats a 9-pack ETB (~34%, ~0.4 SIRs). A 6-pack is a sample. An 18-pack UPC sits in the middle on volume, but Amazon $/pack can make it worse value than a display. On Prismatic Evolutions, the premium illustration slot is much hotter, so even an ETB behaves differently.
Compare sealed formats on Amazon
Mega Evolution—Perfect Order Elite Trainer Box
$89.93
$9.99/pack
GCC Pokémon Ultra Premium Mega Charizard X-ex Collection
$314.47
$17.47/pack
Scarlet & Purple Elite Trainer Set - Prismatic Evolutions
$219.99
$24.44/pack
Card Game Japanese Nihil Zero Booster Box
$95.30
$10.59/pack
Amazon partner links - we may earn a commission at no extra cost to you.
Why compare sealed formats instead of "the set" alone?
Search traffic often mixes "best box for SIR odds" with expansion-level pull rates. The set sets rarity; the sealed SKU sets volume and street price. A Mega Evolution Perfect Order ETB around $90 on Amazon.com (rateTCG catalog, July 2026) and a ~$220 display are different EV stories even when every pack shares the same slot model.
Concrete case: you chase one named SIR and rip a single ETB "for the fun hit". With ~34% chance of any SIR and several SIRs in the set, your named-card odds often fall under 5%. If the Near Mint single sits at $90–130 on TCGPlayer that day, two ETBs already outspend the card with no guarantee. Format choice is a budget decision, not a superstition.
SIR odds table: 6-pack, ETB, UPC, display (ME-style)
Assumption: p ≈ 4.5% per pack for any SIR (rateTCG ME model). Hit rate = 1 − (1 − p)^n. Expected SIRs = n × p. For raw pack volume without SKU framing, see How many boosters for a SIR?.
SIR odds by sealed product (Mega Evolution-style, p≈4.5%)
| Format | Packs | P(≥1 SIR) | Expected SIRs | Best if… |
|---|---|---|---|---|
| 6-pack | 6 | ~24% | ~0.27 | Sampling the set, tiny budget |
| ETB | 9 | ~34% | ~0.40 | Promo + accessories + open feel |
| UPC | 18 | ~56% | ~0.81 | Mid volume + collector extras |
| Display / box | 36 | ~81% | ~1.62 | You optimize SIR hit rate |
| 2× display | 72 | ~96% | ~3.24 | High volume (variance remains) |
rateTCG estimates, July 2026. Check Amazon.com / TCGPlayer prices the day you buy. Not an official TPC rate.
Takeaway: an ETB is not "owed" a SIR. A display lines up better with ME expectation (often 1–2 SIRs) without a floor. For "is it guaranteed?", see Is a SIR guaranteed in a booster box? (spoiler: no).
What does an expected SIR cost in dollars?
rateTCG habit: product price ÷ expected SIRs. That $/expected SIR compares cleanly to singles. Example: a ~$92 ETB for 9 packs → ~0.40 SIR → about $230 per expected SIR. A $220 display for 36 packs → ~1.62 SIRs → about $136 / SIR. The display also lifts hit rate and reduces dry-ETB streaks.
Watch premium UPCs: a Mega Charizard Ultra Premium near $300 for 18 packs can push toward $370 / expected SIR when street price is inflated. You are paying for extras more than SIR volume. On Amazon.com / local shops, compare $/pack before the collector packaging story.
- Any SIR in the set: use the table (p ≈ 4.5% on ME).
- Named chase SIR: roughly divide by the number of SIRs in the set (e.g. 7 SIRs → ~7× cost).
- Prismatic: $/illustration hit drops fast; $/named chase SIR can stay high.
Prismatic Evolutions: the ranking flips
On Prismatic Evolutions, rateTCG models the Special Illustration Rare slot near ~34% per pack. A 9-pack ETB often feels "hit-heavy" in streams. That still does not guarantee a named chase (Umbreon and friends), and TCGPlayer / eBay singles frequently beat stacking ETBs for one card.
Practical US/UK split: if your goal is "feel premium illustration hits", Prismatic sealed can beat a dry ME display. If your goal is "maximize ME SIRs at a fair $/pack", lean display-sized volume. Cross-check with the rateTCG comparator and live prices.
Which Amazon format should you buy?
- ME SIR volume: 36-pack display (or a fair JP 30-pack box) when $/pack is healthy.
- Easy illustration hits / gift unboxing: Prismatic ETB or collections.
- Gift with promo + sleeves: ETB, even if SIR EV is average.
- One chase card: Near Mint single on TCGPlayer before stacking 3–4 ETBs.
- UPC: good for 18-pack volume, bad if collector premium wrecks $/pack.
Common traps when reading SIR odds by product
- Mixing a guaranteed ETB promo with booster SIRs.
- Comparing a $16/pack UPC to a $6/pack display without the ratio.
- Treating a Twitch rip as an official TPC rate.
- Ignoring language/print: a JP 30-pack box is not a US 36-pack display, even if volume helps.
FAQ
Which sealed product has the best SIR odds?
On Mega Evolution-style sets (~4.5%/pack), the 36-pack display has the best hit rate (~81% for ≥1 SIR). On Prismatic, even an ETB has a very strong illustration hit rate.
Is a UPC better than an ETB for SIRs?
Yes for volume (18 vs 9 packs, ~56% vs ~34% for ≥1 SIR on ME). Still compare $/pack: an expensive UPC can lose to a display or to singles.
Is a 6-pack worth it for SIR hunting?
Rarely for chasing: ~24% chance of ≥1 SIR on ME and ~0.27 expected SIRs. Fine for sampling a set, not for forcing a chase.
How do I calculate cost per expected SIR?
Product price ÷ (packs × p). On ME, p ≈ 0.045. Then compare to the TCGPlayer Near Mint price of your chase.
ETB around $90 or a $110 single: which wins?
For a named SIR, one ETB often has under 5% odds of that exact card. The NM single usually wins on EV if you only want that card.
Calculate your pull rates
Search any Pokémon card on rateTCG to estimate pull rates per product and compare Amazon prices.
