> ## Documentation Index
> Fetch the complete documentation index at: https://voltaire.tevm.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# Bytecode.size

> Get bytecode size in bytes

<Card title="Try it Live" icon="play" href="https://playground.tevm.sh?example=primitives/bytecode.ts">
  Run Bytecode examples in the interactive playground
</Card>

<Tabs>
  <Tab title="C">
    ## `bytecode_len(bytecode_t bytecode) size_t`

    Get bytecode size in bytes.

    **Parameters:**

    * `bytecode`: Bytecode to measure

    **Returns:** `size_t` - Size in bytes

    **Example:**

    ```c theme={null}
    #include "primitives.h"

    bytecode_t code = bytecode_from_hex("0x6001");
    size_t length = bytecode_len(code);
    printf("Size: %zu\n", length); // 2
    bytecode_free(code);
    ```

    **Defined in:** [primitives.h](https://github.com/evmts/voltaire/blob/main/src/primitives.h)
  </Tab>
</Tabs>