MEET A BIGGER, BETTER, AND BOLDER
Si-18 international

K-Swiss’ use of red, white, and blue is as recognizable as the shield logo itself.
The colors have been part of the K-Swiss branding expression since 1966.

First introduced in 1989, the Si-18 International is an iconic representation of K-Swiss’ dedication to honoring athletic heritage while optimizing performance for future design. This reissue of the award-winning mid top combines elements of classic K-Swiss tennis, such as a premium leather upper, with innovative engineering that introduced the world to the groundbreaking Silicone Formula 18 for which the shoe is named.

SHOP COLLECTION

MEET A BIGGER, BETTER, AND BOLDER
Si-18 international

K-Swiss’ use of red, white, and blue is as recognizable as the shield logo itself. The colors have been part of the K-Swiss branding expression since 1966.

First introduced in 1989, the Si-18 International is an iconic representation of K-Swiss’ dedication to honoring athletic heritage while optimizing performance for future design. This reissue of the award-winning mid top combines elements of classic K-Swiss tennis, such as a premium leather upper, with innovative engineering that introduced the world to the groundbreaking Silicone Formula 18 for which the shoe is named.

Shop Collection

MEET A BIGGER, BETTER, AND BOLDER Si-18 international

K-Swiss’ use of red, white, and blue is as recognizable as the shield logo itself. The colors have been part of the K-Swiss branding expression since 1966.

First introduced in 1989, the Si-18 International is an iconic representation of K-Swiss’ dedication to honoring athletic heritage while optimizing performance for future design. This reissue of the award-winning mid top combines elements of classic K-Swiss tennis, such as a premium leather upper, with innovative engineering that introduced the world to the groundbreaking Silicone Formula 18 for which the shoe is named.

Shop Collection

SHOP WOMEN'S

SHOP WOMEN'S

SHOP WOMEN'S

The color blue represents trust and stability and will form the base of the color scheme. The blue has been shifted to a deeper navy to give further strength and sophistication to the overall concept.

The color blue represents trust and stability and will form the base of the color scheme. The blue has been shifted to a deeper navy to give further strength and sophistication to the overall concept.

The color blue represents trust and stability and will form the base of the color scheme. The blue has been shifted to a deeper navy to give further strength and sophistication to the overall concept.

Size Chart

Adult & Varsity
	Men			Women			Varsity
Length (in cm)	US	UK	EUR	US	UK	EUR	US	UK	EUR
20							1	13.5	32.5
20.25							1.5	1	33
20.5							2	1.5	33.5
21				4	2	34.5	2.5	2	34
21.5				4.5	2.5	35	3	2.5	35
22				5	3	35.5	3.5	3	35.5
22.5	4.5	3.5	37	5.5	3.5	36	4	3.5	36
23	5	4	37.5	6	4	37	4.5	4	37
23.5	5.5	4.5	38	6.5	4.5	37.5	5	4.5	37.5
24	6	5	38.5	7	5	38	5.5	5	38
24.5	6.5	5.5	39	7.5	5.5	39	6	5.5	39
25	7	6	39.5	8	6	39.5	6.5	6	39.5
25.5	7.5	6.5	40	8.5	6.5	40	7	6.5	40
26	8	7	41	9	7	41
26.5	8.5	7.5	41.5	9.5	7.5	41.5
27	9	8	42	10	8	42
27.5	9.5	8.5	42.5	10.5	8.5	42.5
28	10	9	43	11	9	43
28.5	10.5	9.5	44
29	11	10	44.5	12	10	44.5
29.5	11.5	10.5	45
30	12	11	46
30.5	12.5	11.5	46.5
31	13	12	47
32	14	13	49
32.5	15	14	50
Kids & Toddlers
	Big Kids			Little Kids			Toddlers
Length (in cm)	US	UK	EUR	US	UK	EUR	US	UK	EUR
9.5							2	1.5	17
10.5							3	2.5	18.5
11.5							4	3.5	19.5
12							4.5	4	20
12.5							5	4.5	21
12.75							5.5	5	21.5
13							6	5.5	22
13.5							6.5	6	23
14							7	6.5	23.5
14.5							7.5	7	24
15							8	7.5	25
15.25				8.5	8	25.5	8.5	8	25.5
15.5				9	8.5	26	9	8.5	26
16				9.5	9	27	9.5	9	27
16.5				10	9.5	27.5	10	9.5	27.5
17				10.5	10	28
17.5				11	10.5	28.5
17.75				11.5	11	29
18				12	11.5	29.5
18.5				12.5	12	30
19				13	12.5	31
19.5				13.5	13	32
20	1	13.5	32.5	1	13.5	32.5
20.25	1.5	1	33	1.5	1	33
20.5	2	1.5	33.5	2	1.5	33.5
21	2.5	2	34	2.5	2	34
21.5	3	2.5	35	3	2.5	35
22	3.5	3	35.5	3.5	3	35.5
22.5	4	3.5	36
23	4.5	4	37
23.5	5	4.5	37.5
24	5.5	5	38
24.5	6	5.5	39
25	6.5	6	39.5
25.5	7	6.5	40