How to pronounce 區區 in Cantonese (4 out of 5):

只有區區一塊而已
There's only one block.

Cantonese Sentence Breakdown

只有 zi2 jau5
only
區區 keoi1 keoi1
merely
一塊 jat1 faai3
Together
而已 ji4 ji5
That's it!