Same market, three sizes. The reason funded futures traders can hold risk steady while their account grows is that the exchange sells the same edge in different denominations — micro, mini, and full-size contracts on the same underlying.
Understand the tick math once and sizing stops being guesswork.
One market, three denominations
For most flagship products, the CME lists a full-size contract and a smaller micro (and for some products, an in-between mini or E-mini). They track the same underlying and move on the same chart — the only thing that changes is the multiplier, and therefore the dollar value of a one-tick move.
- Full-size — the original, largest notional. Built for institutions and well-capitalized accounts.
- E-mini — a fraction of the full size; for years the retail standard on indices.
- Micro (Micro E-mini / Micro) — a fraction of the mini again; the finest exchange-listed step, ideal for small accounts and precise scaling.
The naming isn’t perfectly consistent across products — some markets have a mini, some jump straight from micro to full — which is exactly why you confirm the spec per contract rather than assuming.
Why the size ladder matters on a funded account
Three sizes on one underlying gives you something CFDs approximate synthetically but futures do natively and transparently:
- Precise risk steps. Scale from 1 micro to 10 micros to 1 mini without ever leaving the cleared, public order book.
- Survivable drawdown math. On a tight prop-firm limit, a full-size contract can be too blunt an instrument. Micros let you take the setup at a risk your rules can actually absorb.
- Honest scaling as you grow. Add size in small increments that match your edge, not in one intimidating jump.
Because every one of these is exchange-listed and centrally cleared, the tick value is standardized and public — no dealer sets it, and it’s the same number for every trader in the book. That’s the structural payoff: your sizing math is deterministic.
The tick math (do this once)
Every futures contract publishes three numbers: tick size (the smallest price increment), tick value (dollars per tick per contract), and the point/multiplier. Your risk on a trade is simply:
Ticks of stop distance × tick value × number of contracts = dollar risk.
That’s the whole game. Micros use the same tick size as their larger siblings but a smaller tick value, proportional to the multiplier — which is why one micro risks a fraction of what one mini risks over the identical stop.
The futures contract calculator does this conversion for you: enter your stop in ticks or points and it returns dollar risk per contract across micro, mini, and full sizes, so you can pick the denomination that fits your limit.
A reference table (confirm the live specs)
| Term | Relative size | Typical use | Sizing feel |
|---|---|---|---|
| Micro | Smallest | Small/funded accounts, fine scaling | Dial risk in small, precise steps |
| Mini (E-mini) | Mid | Growing accounts, index day trading | Roughly 10× a micro on most products |
| Full-size | Largest | Well-capitalized / institutional | Large notional per tick |
The relationships above (e.g., a micro being a fraction of its mini) are the standard CME design, but exact tick sizes, tick values, and multipliers differ by product and are updated by the exchange — always confirm the current spec with the CME or your broker before you size a live trade.
Sizing on a prop-firm limit
Contract choice and your drawdown rule are the same decision. On a funded account:
- Know your rule. Confirm your drawdown method and limit directly with the firm — static vs trailing, intraday vs end-of-day — because these vary and change.
- Fix your risk per trade as a small slice of that limit, and keep it constant. The position size calculator holds dollar risk fixed while you swap denominations.
- Pick the contract that fits. If one mini’s per-tick value blows past your per-trade budget on a reasonable stop, step down to micros. There’s no shame in it — precision is the point.
- Stress-test the limit with the prop-firm drawdown calculator before you trade, so a normal losing streak can’t end your account by accident.
Thinking in R-multiples keeps this clean: whether you’re in one micro or five minis, “1R” is the same fraction of your account, and your results stay comparable across sizes.
Scale by the numbers, not by nerve
The size ladder is only an advantage if you use it deliberately. Adding contracts because you feel confident is how a good week becomes a blown limit; adding them because your tracked expectancy justifies more size is how accounts compound. Shibiki auto-journals every fill, tags the contract, and reads your results back as edge-health per strategy — so when you step up from micros to minis, it’s a data-backed decision, not a dare.
Learn the tick math, respect the drawdown rule, and let the exchange’s honest size ladder do exactly what it was built for: keep your risk constant while your edge does the growing.
Related: Futures contract calculator · R-multiple explained