Thank you for your inquiry.
You were likely sent the correct wattages for what you ordered. Resistor material composition has changed over the years where they can pack higher wattages in smaller sizes.
If you want you can take the part number you ordered and check against our website, we have the sizes of the resistors listed. We have a number of 1 Watt resistors in our system that are around 0.250 inches long (6.35mm)