Goalkeeper gloves are sized in numbers from 4 (youth) to about 12, and the rule Keeperstop gives is quick: round your hand circumference to the nearest inch and add 1, or round the hand length up to the next inch and add 1 (its example: a 7.5" hand rounds to 8, size 9). An 8" hand is a size 9; Reusch sells the same scale in half sizes by circumference (size 8 = 20.3 cm).
The cut changes the fit
A negative cut sews the seams inside the glove for the closest fit; Keeperstop’s advice for a loose glove is to size down or choose a negative cut. A flat palm with outside seams is the roomiest. Roll-finger gloves wrap the latex round the finger edges; hybrids mix the two.
Gloves with fingersave spines feel stiffer; when between sizes go up rather than down.
size = circumference (in) rounded + 1 or hand length (in) rounded up + 1
Youth sizes
Keeperstop warns that the add-one rule does not work for true youth gloves, which are narrower at the wrist. Its youth guide: sizes 4–5 for ages 7–9 (4'6"–4'8"), 6–7 for 10–12 (4'10"–5'0"). Reusch’s kids chart runs 3.5 for ages 5–6 to 7 for 14–16.
Brand cuts differ inside a size: when the sizer lands between two sizes, or on the edge of a band, try both.
Measuring a keeper’s hand on the screen
Lay the hand on the 1:1 ruler with the thumb out and measure across the four knuckles; the sizer turns the width into a circumference (× 2.42 for men, × 2.41 for women). A strip of paper wrapped round the palm and laid on the ruler replaces that estimate with the measurement itself, and keepers between sizes should use it: half an inch of circumference is a whole goalkeeper size.
For a child, measure each season: the median hand grows about a size every two to three years through primary school. Reusch’s kids’ scale runs 3.5 for 5–6, 4 for 6–7, 4.5 for 7–8, 5 for 8–9, 5.5 for 9–10, 6 for 10–12, 6.5 for 12–14, 7 for 14–16.
Why the screen can be trusted
A browser does not know how big its pixels are, so the sizer starts from a table of 114 phones, tablets, laptops and monitors matched to your screen’s size and pixel ratio, an estimate good to about five percent. Laying a coin or a bank card on the glass and matching its outline replaces the estimate with a measurement good to a fraction of a percent, saved for this screen only.
Browser zoom is corrected automatically from the pixel ratio; pinch zoom is flagged, because nothing drawn is true size until it is undone.
pixels per mm = CSS px across the card ÷ 85.60 mm ID-1 card: 85.60 × 53.98 mm (ISO/IEC 7810)