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1. A sizing caliper for facilitating the selection of a femoral component of a knee prosthesis to be attached to a resected distal end of a femur, the femur having one or more posterior femoral condyles, the caliper having a longitudinal axis L and comprising:
a caliper body configured for engaging the resected distal end of the femur, wherein the caliper body comprises a base portion configured to couple and decouple from the caliper body using a sliding mechanism, the base portion being configured to be positioned adjacent to surfaces of the one or more posterior femoral condyles of the femur for referencing the caliper body to one or more of the posterior femoral condyles when the caliper body engages the resected distal end of the femur; a stylus tower; a stylus coupled to the stylus tower and having a tip, the stylus configured to place the tip adjacent an anterior condyle surface of the femur when the caliper body engages the resected distal end of the femur, wherein the distance between the tip of the stylus and the base portion defines an anterior/posterior dimension; and two drill guide bodies, each drill guide body provided with a drill guide hole and the drill guide holes are located at a midpoint of the anterior/posterior dimension, wherein the caliper body, the stylus tower and the two drill guide bodies are configured to be slidably linked to each other, whereby as the caliper body and the stylus tower are linearly displaced in opposite directions along the longitudinal axis L relative to the two drill guide bodies, the caliper body and the stylus tower are linearly displaced at an equal rate relative to the drill guide bodies and the drill guide holes remain located at the midpoint of the anterior/posterior dimension.
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