FIG. 1 is a front perspective view of a shirt collar showing my new design;
FIG. 2 is an enlarged view of the button panel shown in FIG. 1;
FIG. 3 is a back perspective view thereof;
FIG. 4 is an enlarged view of the button panel shown in FIG. 3;
FIG. 5 is a front elevation view thereof;
FIG. 6 is an enlarged view of the button panel shown in FIG. 5;
FIG. 7 is a back elevation view thereof;
FIG. 8 is a right side elevation view thereof;
FIG. 9 is an enlarged view of the button panel shown in FIG. 8;
FIG. 10 is a left side elevation view thereof;
FIG. 11 is an enlarged view of the button panel shown in FIG. 10;
FIG. 12 is a top plan view thereof;
FIG. 13 is an enlarged view of the button panel shown in FIG. 12;
FIG. 14 is a bottom plan view thereof;
FIG. 15 is a front perspective view of an alternative embodiment;
FIG. 16 is an enlarged view of the button panel shown in FIG. 15;
FIG. 17 is a back perspective view thereof;
FIG. 18 is an enlarged view of the button panel shown in FIG. 17;
FIG. 19 is a front elevation view thereof;
FIG. 20 is an enlarged view of the button panel shown in FIG. 19;
FIG. 21 is a back elevation view thereof;
FIG. 22 is a right side elevation view thereof;
FIG. 23 is an enlarged view of the button panel shown in FIG. 22;
FIG. 24 is a left side elevation view thereof;
FIG. 25 is an enlarged view of the button panel shown in FIG. 24;
FIG. 26 is a top plan view thereof;
FIG. 27 is an enlarged view of the button panel shown in FIG. 26; and,
FIG. 28 is a bottom plan view thereof.
The broken lines shown in the drawings represent environmental structure that forms no part of the claimed design.