Round-Face Brow Chart

The three lines to measure, the peak band for every brow length from 45 mm to 70 mm, the six things to avoid, and a two-week test log. One page, print it or keep it on your phone.

1. The three lines to measure

• Brow lengthInner start to the tip of the tail, following the brow. mm  =   in
• Peak positionAlong the brow, from the inner start to the highest point. mm  =   in
• LiftVertical gap from the upper lash line to the underside of the brow, taken where that gap is narrowest. mm  =   in
• Cheekbone widthAcross the tops of the cheekbones. On a round face it lands close to your forehead-to-chin length. mm  =   in

Convert with inches = millimetres ÷ 25.4. The international inch has been exactly 25.4 mm since 1959, so this division is exact arithmetic, not an approximation. A flexible tape works; so does a strip of paper you mark and then lay against a ruler.

2. Peak band lookup, 45 mm to 70 mm

Where the peak belongs, counted in from the inner start of the brow. The band runs from the outer third to the outer quarter of the brow length — that is, from two thirds to three quarters of the total.

Brow length (mm)	Brow length (in)	Peak band from inner start (mm)	Peak band (in)
45	1.77	30.0 – 33.8	1.18 – 1.33
46	1.81	30.7 – 34.5	1.21 – 1.36
47	1.85	31.3 – 35.3	1.23 – 1.39
48	1.89	32.0 – 36.0	1.26 – 1.42
49	1.93	32.7 – 36.8	1.29 – 1.45
50	1.97	33.3 – 37.5	1.31 – 1.48
51	2.01	34.0 – 38.3	1.34 – 1.51
52	2.05	34.7 – 39.0	1.37 – 1.54
53	2.09	35.3 – 39.8	1.39 – 1.57
54	2.13	36.0 – 40.5	1.42 – 1.59
55	2.17	36.7 – 41.3	1.44 – 1.63
56	2.20	37.3 – 42.0	1.47 – 1.65
57	2.24	38.0 – 42.8	1.50 – 1.69
58	2.28	38.7 – 43.5	1.52 – 1.71
59	2.32	39.3 – 44.3	1.55 – 1.74
60	2.36	40.0 – 45.0	1.57 – 1.77
61	2.40	40.7 – 45.8	1.60 – 1.80
62	2.44	41.3 – 46.5	1.63 – 1.83
63	2.48	42.0 – 47.3	1.65 – 1.86
64	2.52	42.7 – 48.0	1.68 – 1.89
65	2.56	43.3 – 48.8	1.70 – 1.92
66	2.60	44.0 – 49.5	1.73 – 1.95
67	2.64	44.7 – 50.3	1.76 – 1.98
68	2.68	45.3 – 51.0	1.78 – 2.01
69	2.72	46.0 – 51.8	1.81 – 2.04
70	2.76	46.7 – 52.5	1.84 – 2.07

Peak band = brow length − one third of brow length, to brow length − one quarter of brow length. Every inch figure is the millimetre figure divided by 25.4 and rounded to two decimals. Worked example: a 58 mm brow gives 58 ÷ 25.4 = 2.2835, so 2.28 in; one third of 58 is 19.3 mm and one quarter is 14.5 mm, so the peak belongs between 38.7 mm and 43.5 mm from the inner start, which is 1.52 in to 1.71 in.

3. Six things to avoid

1. Excavating only beneath the peak. It does not raise the brow, it hollows the middle. What returns is thin at both ends and bulbous over the eye. Removal runs the whole length, start to tail, evenly.
2. A tail that ends below the inner start. Level is acceptable, higher is lifting, lower drags the eye down with it.
3. A dead horizontal line. A level brow is a width statement, and it can pull the resting face into something blank. Keep an upward direction in it if you want it straighter.
4. Carving a peak into a flat, sparse brow. Sparse hair cannot be carved into a shape; it can only be drawn toward one.
5. Thinning an already sparse brow to match a diagram. If matching the diagram makes the brow vanish, the diagram is wrong for you, and filling the outline afterwards reads as drawn-on because there is no hair texture inside the line.
6. Turning all four dials at once. Bend, height, length and thickness move separately. Change all four and you cannot tell which one worked.

4. Two-week test log

One dial at a time. Wear each change for a fortnight before you decide about the next one.

Dial turned (only one)	Date started	Verdict after two weeks	Keep or roll back

The four dials: bend (how pronounced the arch is) · height (how far above the eye the brow sits) · length (where the tail ends and how far out it runs) · thickness (the one that is not free — it needs bone structure, eye size and feature weight underneath it to hold).