Combine the four uploaded images of earrings into a single professional product catalog page. Arrange the four pairs of earrings neatly in a 2x2 grid on a clean, neutral, off-white background. Underneath each pair, place a small, clear number. The top-left pair should be labeled '1'. The top-right pair should be labeled '2'. The bottom-left pair should be labeled '3'. The bottom-right pair should be labeled '4'. Ensure the numbers are legible but discreet. The final image should be high-quality, well-composed, and look like a professional product sheet.
