The ornamental design for a pair of side surfboardfins, as shown and described.
FIG. 1 is a top perspective view of a pair of side surfboard fins showing my new invention;
FIG. 2 is a bottom perspective view of a pair of side surfboard fins;
FIG. 3 is a top plan view of the right fin of a pair of side surfboard fins;
FIG. 4 is a bottom plan view of the right fin of a pair of side surfboard fins;
FIG. 5 is a front elevational view of the right fin of a pair of side surfboard fins;
FIG. 6 is a rear elevational view of the right fin of a pair of side surfboard fins;
FIG. 7 is a side elevational view of the right fin of a pair of side surfboard fins; and,
FIG. 8 is another side elevational view of the right fin of a pair of side surfboard fins.
The broken lines in the drawing are for illustrative purposes only and form no part of the claimed design.
The single right fin of a pair of side surfboard fins is shown separately for convenience of illustration; the left fin is a mirror image of the right fins.