Tank sweaters are available in two sizes. TS1 (formerly 203): Tall skinny, 29.5 tall x 18.15” diameter. Fits tank sizes from 30”-52” tall x 14” x 18” diameter. TS2 (formerly 250): Short fat, 20” tall x 24.50” diameter. Fits tank sizes from 20”-29” tall x 19”-24” diameter. Download Tank Sweaters Brochure