The ornamental design for a curtain rail with holders and loops, as shown and described.
FIG. 1 is a top view of the curtain rail with the holders and loops omitted for clarity, the broken lines indicating an indeterminate length; the bottom view is identical;
FIG. 2 is a left side view of the curtain rail; the right side view is identical;
FIG. 3 is a fragmentary view of one end of the curtain rail with holders and loops, the holder being cylindrical; and,
FIG. 4 is a rear view of the curtain rail with holders and loops, the holder being cylindrical.
The broken lines showing environment in FIGS. 1 and 2 are for illustrative purposes only and form no part of the claimed design.