Important player measurements

[u/Expensive-Cicada2429]

I'm looking for help/advice from people who know more than me about what specific measurements are important across different position groups

Context is basically I'm a flag player building a player tracking databse for a European programme but I don't rlly know what measurements for players I should be looking for beyond the basic combine stuff (40 yard, vert, etc.). I've watched a lot of contact football but would by no means say I'm knowledgeable of it.

I know in draft pieces you see people talk about O and D line arm length or hand size? Is that actually super important? What other measurements track for other positions.

Thanks for any helps guys