Whether square or oblong, in which latter case the length to be twice as long as the width.
| Red cross of St. George | 1/5 | of width of flag. |
| White border to St. George | 1/3 | of red of St. George. |
| Red cross of St. Patrick | 1/3 | " |
| White border to St. Patrick | 1/6 | " |
| Red cross of St. Patrick | 1/3 | " |
| Broad white of St. Andrew | 1/2 | " |
The paramount cross of St. George is to be one-fifth of the width of the flag on the flagstaff, and its width is made the factor by which the measurements of all the other parts are to be regulated in flags of varying sizes.
The crosses of the two other Jacks, which were to be joined, are each allotted a proportion of one-third the width of the cross of St. George.
The divisions of the parts for the Irish Jack are stated separately, being one-third for the red cross of St. Patrick, and one-sixth for its white border; the two measurements, when added together, amounting to a proportion of one-half.
The proportion of one-half allotted to the "broad white of St. Andrew" comprises the due share of one-third for the Scotch cross, and one-sixth for its border, being an exact equality to the proportions given to the Irish cross and its border.
51. Outline Jack—The Proper Proportions of the Crosses.
(From a photograph taken at the spot.)
At first sight it would appear that the "broad white of St. Andrew" was given a larger proportion of the flag, but the measurements of the "cross" and its "border" of the Scotch Jack are stated in one figure, because their colours are the same, while those of the Irish Jack are given separately, because the colours are different, the cross being red and its border white.