This document specifies the components and specifications for barcode labels for seed and herbarium samples, including: - Polyester labels that are 90 microns thick with permanent adhesive and available in rolls of 5,000 labels measuring 3.30 x 3.50 cm with radius corners of 2.00 mm and 3 columns. - A thermal transfer ribbon compatible with Zebra printers that provides scratch and smear resistance for $50 per roll. - A Zebra ZT410 thermal transfer printer costing $1100 that prints barcodes and labels with 203 DPI resolution. - Data Matrix barcodes are used to label seed samples.