Sizing
Measure before you buy
Updated October 24, 2026. Always confirm the chart on the Amazon listing for the exact SKU.
Short answer: Measure chest girth, neck, and back length with a soft tape — do not buy by breed name or weight alone. If you are between sizes, size up (too-small drives most Fung Fay white dress shirt returns). For that shirt we most often keep S, L, and XXL in stock: S about 3.4–5.5 lb, L 8.9–15.4 lb, XXL 18.8–24.3 lb (chest girth still wins when numbers disagree). Full chart and Amazon ASIN links: white dress shirt size chart. Detailed notes: Fung Fay sizing & fit notes.
What measurements matter?
- Chest girth — around the widest part of the rib cage, just behind the front legs. Leave room for two fingers under the tape. Full steps.
- Neck — where a collar normally sits.
- Back length — from the base of the neck (collar point) to the base of the tail.
If you are between sizes
Choose the larger size. Our return data shows too-small more often than too-large for the white dress shirt.
White dress shirt stock focus
We most often keep S, L, and XXL available. Open the white dress shirt page for ASIN links, then finish sizing on Amazon.