The phrase "again small enough to" is correct and usable in written English.
It can be used when referring to something that has returned to a smaller size or condition after being larger or different previously.
Example: "After the adjustments, the model was again small enough to fit into the designated space."
Alternatives: "once more small enough to" or "back to being small enough to".
Cut one of the slices in half, then again, and again until it is small enough to serve to your fish.
A potential application: a stent that can be opened once placed within a patient's body, such as inside an artery, and then, after the stent has served its purpose, be heated again to make it small enough to remove.
Repeat the loop twist again until the loop is small enough to fit through the other loop.
Seven thousand more jobs will be eliminated at L. M. Ericsson, half of them in Sweden, as the new chief executive tries to make the company small enough to earn profits again in the slumping mobile telephone business.
Once the bigger boulders were dislodged, the process would start again on smaller boulders, until the rocks were small enough to go into a crushing machine and turned into a fine powder used to fortify concrete.
Earlier this year, scientists discovered a new gene in a flu virus whose genome consists of just 14,000 letters (small enough to fit into 100 tweets), and had been sequenced again and again.
Once again, you'll want to make sure that your ice balls are small enough to fit in whichever glass you plan to use.
And while the stolen code only works once, it's small enough to secrete away somewhere, letting it steal codes time and again, ensuring it always works.
If you are worried about your appearance when around people, carry a tiny mirror (small enough to carry round in your hand,) and look every now and again.
If you're after a smaller university then Glasgow Caledonian is small enough to make uni feel more personal but big enough that it's not school all over again.
