This will produce small sticks, the length of the chunks, which can then be cut into dice if you wish.
Remarks
The idea that "the bigger a courgette is, the less flavour it has" is not easy to put over, especially as amateur gardeners usually think quite the opposite: "Ooh, a big courgette - yummy!" But unfortunately the big ones (on the way to becoming marrows) are only good for stuffing.
The Pourcel brothers (chef twins) only use courgettes that have seeds for making a puree which is then sieved.