Flag Sizes – Germany, United States & United Kingdom | FlagGeek

Flag Sizes

This page provides consolidated reference tables for historical flag sizes from Germany, the United States, and the United Kingdom, covering multiple military periods and service branches. Included are Imperial German Navy war-flag sizes, Nazi-era naval and state size systems, U.S. G-Spec and MIL-F-2692 ensign dimensions, and British 1:2 ensign standards.

Note: These tables are not exhaustive — size systems varied between eras, depots, manufacturers, and branches of service. Always cross-check with original flag catalogues and period manufacturer data.

For detailed catalogue sources, see: FlagGeek Resource Page .

Imperial German Navy War Flag Sizes (1903–1918)

Size (cm) Ratio German Designation Usage / Ship Type Example Status / Marking
050 × 050 1.00:1 Gösch Bow flag in port Depot – Gösch / bow flag
060 × 100 1.67:1 U-Bootsflagge U-boats, small craft SM U-9 Depot – 1 × 6
095 × 157 1.65:1 Bootsflagge Torpedo boats S90-class Depot – 1.5 × 0.95
125 × 200 1.60:1 Gaffelflagge Auxiliary ships Depot ship Official – Size 5
150 × 250 1.67:1 Gaffelflagge Small cruisers SMS G38 Official – Size 4
180 × 300 1.67:1 Gaffelflagge Light cruisers SMS Dresden Official – Size 3
190 × 315 1.66:1 Toppflagge Masthead / command SMS Derfflinger Field use
225 × 375 1.67:1 Gaffelflagge Command ships SMS Scharnhorst Official – Size 2
240 × 400 1.67:1 Gaffelflagge Armored cruisers SMS Blücher Official – Size 2
270 × 450 1.67:1 Gaffelflagge Battleships SMS König Official – Size 1

Color Codes:
[Green] Official – listed in regulations
[Yellow] Depot use – documented but unofficial
[Grey] Field use – not standardized

Notes:
• Some depot sizes deviate from standard 5:3 ratio.
• Depot sizes like 60×100 and 95×157 were authentic but not listed in formal naval regulations.

Sources:
Marine-Verordnungsblatt (1903–1913), Dienstvorschriften, archival depot flags, shipyard records, and museum publications.

Standard Flag Sizes – Nazi Germany (1933–1945)

Kriegsmarine / Gösch / Reichsdienstflagge / Naval Ensign Sizes

Size Dimensions (cm) Ratio Ratio Note In FlagGeek Collection Flag Type in Collection
1 18 × 30 ≈ 3:5 approx. 3:5 Wassersportflagge
2 40 × 65 ≈ 8:13 not 3:5
3 50 × 85 ≈ 10:17 approx. 3:5 Kriegsflagge / Gösch
4 Not known
5 80 × 135 ≈ 3:5 approx. 3:5 Kriegsflagge / Gösch
6 100 × 170 ≈ 3:5 approx. 3:5 Kriegsflagge
7 150 × 250 3:5 exact 3:5 Kriegsflagge
8 200 × 335 ≈ 3:5 approx. 3:5 Kriegsflagge
9 250 × 400 5:8 not 3:5 Reichsdienstflagge
10 300 × 500 3:5 exact 3:5 Gösch
11 400 × 670 ≈ 3:5 approx. 3:5
12 450 × 750 3:5 exact 3:5

Standard Flag Sizes – United States

U.S. Ensign Sizes (G-Spec / MIL-F-2692)

Size Feet Inches Centimeters Ratio In FlagGeek Collection Flag Type in Collection
1 20.00 × 38.00 240 × 456 609.6 × 1158.2 10:19
2 19.00 × 36.10 228 × 433.2 579.1 × 1099.4 10:19
3 14.35 × 27.27 172.2 × 327.2 437.4 × 830.5 10:19
4 12.19 × 23.16 146.3 × 277.9 371.5 × 705.0 10:19
5 10.00 × 19.00 120 × 228 304.8 × 579.1 10:19
6 8.94 × 16.99 107.3 × 203.9 272.5 × 517.9 10:19
7 5.14 × 9.77 61.7 × 117.2 156.7 × 297.8 10:19
8 5.00 × 9.50 60 × 114 152.4 × 289.6 10:19
9 3.52 × 6.69 42.2 × 80.3 107.3 × 203.9 10:19
10 2.90 × 5.51 34.8 × 66.1 88.4 × 167.9 10:19
11 2.37 × 4.50 28.4 × 54.0 72.2 × 137.2 10:19
12 1.31 × 2.49 15.7 × 29.9 39.9 × 75.9 10:19 U.S. Ensign “No. 12 MI 1941”

Note: All U.S. military and government flags use a fixed 10:19 ratio under official standards (e.g., MIL-F-2692, G-Spec).
These sizes were used across ships, bases, vehicles, and ceremonial displays.

Standard Flag Sizes – United Kingdom

Union Jack / Red, White & Blue Ensigns

Size Feet Inches Centimeters Ratio In FlagGeek Collection Flag Type in Collection
1 18.00 × 36.00 216 × 432 548.6 × 1097.3 1:2
2 12.00 × 24.00 144 × 288 365.8 × 731.5 1:2
3 8.00 × 16.00 96 × 192 243.8 × 487.7 1:2
4 6.00 × 12.00 72 × 144 182.9 × 365.8 1:2
5 5.00 × 10.00 60 × 120 152.4 × 304.8 1:2
6 4.00 × 8.00 48 × 96 121.9 × 243.8 1:2
7 3.00 × 6.00 36 × 72 91.4 × 182.9 1:2
8 2.50 × 5.00 30 × 60 76.2 × 152.4 1:2
9 2.00 × 4.00 24 × 48 61.0 × 121.9 1:2
10 1.50 × 3.00 18 × 36 45.7 × 91.4 1:2
11 1.25 × 2.50 15 × 30 38.1 × 76.2 1:2
12 1.00 × 2.00 12 × 24 30.5 × 61.0 1:2
100 × 200 1:2 White Ensign

Note: All Union Jacks and British ensigns (Red, White, Blue) follow a fixed 1:2 ratio and share the same standard size system.
This table applies to:
🇬🇧 Union Jack (as naval jack) · 🟥 Red Ensign (civil use) · 🟦 Blue Ensign (state/public) · ⚪ White Ensign (Royal Navy)


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