Citizen Eco-Drive

Most Citizen Eco-Drive references take a 22 mm watch strap: 32 of 94. The lug width follows the case size: 25 mm case → 6 mm, 40 mm case → 20 mm, 41 mm case → 22 mm and 42 mm case → 22 mm.

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Citizen Eco-Drive lug width by case size

94 references measured. Updated 2026-10-30.

Case	Lug width	References	Watch strap attachment	For example
18 mm	7 mm	2	—	EG7081-51L, EG7086-57P
23 mm	10 mm	2	—	EX1420-50E, EX1422-54E
24 mm	14 mm	2	—	EM1192-01E, EM1193-08D
25 mm	6 mm · 12 mm on 3 · 13 mm on 1	7	—	EM0860-51D, EM0862-56D, EM0863-53D
27 mm	12 mm	1	—	EW3144-51A
28 mm	15 mm · 7 mm on 2 · 12 mm on 1	6	—	EW2340-58A, EW2344-57A, EW2348-56A
30 mm	15 mm · 14 mm on 2 · 16 mm on 1	6	—	FE1140-86X, FE1146-71A, FE1147-79P
31 mm	14 mm	2	—	EM1091-67X, EM1098-68D
33 mm	16 mm	2	—	EO1222-50P, EO1224-54D
37 mm	19 mm · 20 mm on 2 · 18 mm on 1	7	—	FD0000-52N, FD0002-57D, FD0004-51D
40 mm	20 mm · 23 mm on 4 · 21 mm on 3	12	—	AU1040-08E, AW0092-07Q, AW0096-06L
41 mm	22 mm · 20 mm on 4 · 23 mm on 1	18	—	AW1147-52L, AW1890-19B, AW1890-51X
42 mm	22 mm · 26 mm on 1	12	—	AW0081-54L, AW0082-01A, AW0089-52E
43 mm	22 mm · 24 mm on 1	7	—	AW0050-82E, AW1430-86A, AW1598-70X
44 mm	23 mm	6	—	BU0054-52L, BU0057-54E, BU2013-08E
45 mm	22 mm	2	—	AT2447-01E, CA4213-18L

References that take a different watch strap

EG2790-12A: 12 mm, not the 6 mm of most 25 mm cases
EG2797-13A: 12 mm, not the 6 mm of most 25 mm cases
EG2799-18W: 12 mm, not the 6 mm of most 25 mm cases
EW1264-50A: 13 mm, not the 6 mm of most 25 mm cases
EM0630-51D: 12 mm, not the 15 mm of most 28 mm cases
EM0990-81E: 7 mm, not the 15 mm of most 28 mm cases
EM0996-84Y: 7 mm, not the 15 mm of most 28 mm cases
FE1082-05A: 14 mm, not the 15 mm of most 30 mm cases
FE1234-50L: 14 mm, not the 15 mm of most 30 mm cases
GA1052-04E: 16 mm, not the 15 mm of most 30 mm cases
BM8180-03E: 18 mm, not the 19 mm of most 37 mm cases
FE7130-01L: 20 mm, not the 19 mm of most 37 mm cases
FE7130-10D: 20 mm, not the 19 mm of most 37 mm cases
AU1062-56E: 23 mm, not the 20 mm of most 40 mm cases
AU1062-56G: 23 mm, not the 20 mm of most 40 mm cases
AU1065-07E: 23 mm, not the 20 mm of most 40 mm cases
AU1065-58G: 23 mm, not the 20 mm of most 40 mm cases
AW1232-04A: 21 mm, not the 20 mm of most 40 mm cases
AW1236-03A: 21 mm, not the 20 mm of most 40 mm cases
AW1780-25A: 21 mm, not the 20 mm of most 40 mm cases
BJ6517-52E: 23 mm, not the 22 mm of most 41 mm cases
BM7251-53H: 20 mm, not the 22 mm of most 41 mm cases
BM7251-53L: 20 mm, not the 22 mm of most 41 mm cases
BM7252-51E: 20 mm, not the 22 mm of most 41 mm cases

And 3 more in the full list below.

Questions about the Citizen Eco-Drive

Do all Citizen Eco-Drive case sizes take the same watch strap?

No. The lug width changes with the case size: the 25 mm case takes 6 mm, the 37 mm case takes 19 mm, the 40 mm case takes 20 mm, the 41 mm case takes 22 mm and the 42 mm case takes 22 mm. Check your case diameter before you buy.

Can two Citizen Eco-Drive watches with a 41 mm case take different watch straps?

Yes. Of the 18 Citizen Eco-Drive references with a 41 mm case, 13 take 22 mm, 4 take 20 mm and 1 take 23 mm. The reference number decides, not the case size alone.