A question has arisen.
I started to think about this.
There has to be at least 8. This is not in dispute. But one cannot rule out additional unviewable holes in the back of the shirt. Making the question relatively difficult to answer.
Further, we must consider the definition of “hole”. If “hole” can be interpreted to mean “gap in the cloth”, then at a small but still marginally macroscopic scale, then the answer is asymptotically close to infinity. In addition, at the quantum level, the sudden departure of an electron from one place and arrival in another without appearing to travel through the intervening space must unarguably involve a hole of some kind. Given the relative liveliness of the average electron, and the cumulative mass of the shirt, the number of these holes must also by asymptotically close to infinity.
This presents us with a problem. We have two simultaneous instances of almost-infinity within the one garment. Since there cannot mathematically or physically be even one infinity, and here we seem to have 1.99999999-recurring infinities, we have a paradox, and, therefore, technically the shirt cannot exist at all.
Which is the correct answer, because it’s just a jpeg.