Key takeaways
- In real basketball the differences by position are large and well documented: one study of Spanish professionals recorded mean heights of 182.28 cm for guards, 195.65 cm for forwards and 204.08 cm for centres.
- Arm span is not a cosmetic figure. In a study of youth national-team players, body height and arm span were the two strongest anthropometric predictors of playing position across age groups from under-14 to under-20.
- A game has to decide how much of that to model. Basketball Career Sim documents height, weight, wingspan, age, jersey number and style as part of creating the player, alongside the archetype and attributes you choose to build on.
- The documented levers on what the simulator lets you attempt are the archetype and the attributes. Treat the body metrics as identity and role fit, and make them consistent with the archetype rather than expecting them to substitute for it.
- Age is the one creation-screen number with an obvious clock attached, because it sets how many seasons of development you get before decline becomes the story.
The creation screen asks for your height, your weight and your wingspan, and then it asks for an archetype. The reasonable question a new player has is whether the first three do anything at all, or whether they are the sporting equivalent of choosing a hair colour.
It is a question about the game's model rather than about basketball, and it deserves a straight answer rather than folklore.
What the creation screen actually asks for
Basketball Career Sim — our own app, built by Reign Creative — describes its first step plainly: choose a position, then set name, height, weight, wingspan, age, jersey number and style, along with the archetype and attributes you want to build on.
Read that list carefully and it splits into three groups. Name, jersey number and style are identity. Height, weight and wingspan are the physical description of the player you are presenting. Archetype and attributes are the commitment — the part the game elsewhere describes as steering what happens next, through training camp, attribute upgrades and signature moves that change what you can attempt.
That distinction is the answer in miniature, and the rest of this article is why it is the right way round.
In the real sport, the numbers are enormous
It is worth establishing how large these differences actually are, because the intuition that "tall players play inside" undersells it considerably.
A 2015 study in the Journal of Human Kinetics measured Spanish professional players and found the three position groups separating cleanly. Mean height ran 182.28 cm for guards, 195.65 cm for forwards and 204.08 cm for centres. Mean body mass ran 79.56 kg, 91.04 kg and 104.56 kg across the same groups. Put as gaps, guards were 6.6 per cent shorter than forwards and 11 per cent shorter than centres, and the difference in upper-arm circumference between centres and guards was around 6 per cent.
Arm span is doing independent work in that picture. A 2019 study, also in the Journal of Human Kinetics, looked at youth national-team players from under-14 to under-20 and asked whether anthropometry could predict position. Body height and arm span came out as the two strongest predictors — with the analysis reporting R² values of 0.87 for height and 0.75 for arm span — and the relationship held after controlling for biological maturation, which is the obvious confound in youth data.
So wingspan is not a game designer's flourish. It is one of the two measurements that best separates a centre from a guard in real talent identification.
None of this is regulated, incidentally. The international rules published by FIBA — the only basketball rules recognised internationally, with variants used by the professional and college competitions in the United States — govern the court, the clock, the fouls and the fact that five players per team are on the floor. They say nothing about how tall any of them may be. The distribution is emergent, not imposed.
What a simulation has to decide
Every sports game faces the same design problem: real performance depends on a great many interacting physical and skill variables, and a phone game cannot model all of them without becoming unplayable.
The general shape of the answer is covered in how simulation engines turn ratings into results. The short version is that engines compress reality into a manageable set of inputs and then weight those inputs against the situation. Which inputs make the cut is a design decision, and it is not the same in every game.
Here the honest statement is this: Basketball Career Sim documents height, weight and wingspan as things you set when you create your player. What it documents as shaping outcomes is the archetype you commit to, the attributes you develop through training camp and upgrades, and — during a possession — your choice, with the court view showing score, stats, momentum and positioning as it resolves.
It would be easy to write a paragraph asserting that a 2.06 m build with a long wingspan adds some specific percentage to contested rebounds. That paragraph would be invented, and inventing it would be worse than useless to someone trying to plan a career. What can be said is that the game's stated levers are the archetype and the attributes, so those are where planning effort belongs.
Build the body to match the archetype
That leads to a practical rule that works regardless of how any particular engine is weighted.
Choose the archetype first. Then choose body metrics that are consistent with it. A perimeter creator built at centre height is fighting its own description; a rim-protecting build at guard height is doing the same thing in reverse. Even where the numbers are primarily descriptive, coherence is worth having, because you will spend many seasons reading your own player's profile and it should tell a single story.
This is also the point where what each of the five positions is actually for becomes useful reading rather than background. Position defines the job. Archetype defines the style you do it in. Body metrics describe the player doing it. Getting those three to agree is the whole of good character creation.
Age is the number with a clock on it
One creation-screen value behaves differently from the rest, and it is the one people set carelessly.
Age determines how many development cycles you get before the career's arc turns. Basketball Career Sim runs a career in stages — youth development, high school, recruiting and college, the draft, then the pro years, playoffs and awards — so the age you start at positions you within that arc rather than simply setting a number on a profile.
A younger start buys more seasons of compounding growth and a longer run at the early stages. An older start shortens the runway. Neither is wrong, but only one of them is a choice you cannot walk back with training.
What to do at the creation screen
Four steps, in order.
Decide what kind of basketball decision you want to be offered repeatedly, because Live Sim will hand you that decision — shoot or move it on, lock down your matchup or call for help, play safe or take the risk — for the length of the career.
Pick the archetype that produces that decision. This is the commitment.
Set height, weight and wingspan to describe a player who plausibly plays that way, using the real positional ranges above as a sanity check rather than a rule.
Then spend your first development into the attributes the archetype actually uses, and keep spending there until the build is competitive at something rather than adequate at everything.
Every league, team, school and player in the game is fictional, the in-game money has no real-world value, and it plays offline without an account. What it is really asking you at that first screen is not how tall you would like to be. It is what kind of player you want to spend a decade of simulated seasons being — and the rest of the sports career and GM library is largely about answering that question well in one sport or another.
Good to know
Frequently asked questions
Does height change how a career sim plays?
How much do real basketball positions differ physically?
Is wingspan a real thing or a game invention?
Which creation-screen choice matters most?
Sources
- Anthropometric Characteristics of Spanish Professional Basketball Players (opens in a new tab)Journal of Human Kinetics (Vaquera et al., 2015) — accessed
- Can Anthropometric Variables and Maturation Predict the Playing Position in Youth Basketball Players? (opens in a new tab)Journal of Human Kinetics (Gryko et al., 2019) — accessed
- Official Basketball Rules (opens in a new tab)FIBA — accessed
League, team and athlete names appear here only to identify the rules, records and history being discussed. Reign Creative LLC's sports games are not affiliated with, endorsed by or licensed by any league, team, players' association or athlete, and all names and marks belong to their owners.
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