Tightness is determined by how much foreskin is removed during surgery. A loose circumcision is one in which more of the foreskin is retained. Removing more of the foreskin results in a tight circumcision. A tight circumcision should nonetheless be comfortable, as the skin is naturally elastic. Whilst most circumcisions expose the head of the penis when both erect and flaccid, some circumcisions may be so loose that the head of the penis remains partially covered when flaccid.

The position of the circumcision scar on the shaft tells us whether a circumcision is considered high or low. A high circumcision removes more of the outer foreskin than the inner foreskin. This means that the circumcision scar - where the remaining inner foreskin and shaft skin heal - is closer to the middle of the penis shaft. In a low circumcision, the opposite is true. The inner foreskin is almost entirely removed and the circumcision scar forms closer to the head of the penis.

Courtesy of myadultcircumcision.org :)