Check for curd a proper firmness. To do this, insert a knife with the blade sideways and gently pull upwards, if the curd splits it's ready to be cut.
Once the curds is ready, cut it into 3/8" cubes. Do this by making a checkerboard patter with a curd knife, then insert a ladle, or very loose wisk, to make horizontal cuts.
After cutting, let the curds rest for 3-5 minutes.