From Wikinline

Deshi

The main Deshi skates size is the European size, full increments.

EU	UK	US M
47	12	13
46	11	12
45	10	11
44	9.5	10.5
43	9	10
42	8	9
41	7	8
40	6	7
39	5	6

Fila

The main Fila skate sizes are UK/US in 0.5 increments.

UK	EU	US M	US L
13	48	14	15
12.5	47.5	13.5	14.5
12	47	13	14
11.5	46	12.5	13.5
11	45.5	12	13
10.5	45	11.5	12.5
10	44	12	12
9.5	43.5	10.5	11.5
9	43	10	11
8.5	42.5	9.5	10.5
8	42	9	10
7.5	41	8.5	9.5
7	40.5	8	9
6.5	40	7.5	8.5
6	39	7	8
5.5	38.5	6.5	7.5
5	38	6	7
4.5	37.5	5.5	6.5
4	37	5	6
3.5	36	4.5	5.5
3	35.5	4	5

Rollerblade

The main Rollerblade skates size is the Mondo Point (CM) size, 0.5 increments.

MP	EU	UK	US M	US L
33	49	14	15
32.5	48.5	13.5	14.5
32	48	13	14
31.5	47.5	12.5	13.5
31	47	12	13
30.5	46	11.5	12.5
30	45.5	11	12
29.5	45	10.5	11.5
29	44.5	10	11
28.5	44	9.5	10.5
28	43	9	10
27.5	42.5	8.5	9.5	10.5
27	42	8	9	10
26.5	41	7.5	8.5	9.5
26	40.5	7	8	9
25.5	40	6.5	7.5	8.5
25	39	6	7	8
24.5	38.5	5.5	6.5	7.5
24	38	5	6	7
23.5	37	4.5	5.5	6.5
23	36.5	4	5	6
22.5	36	3.5	4.5	5.5
22	35	3	4	5

Seba

The main Seba size is European, in full increments.

EU	MP	UK	US M	US L
47	30.5	12	13.5	12.5
46	30	11	12	12
45	29	10	11	11
44	28.5	9.5	10.5	10.5
43	28	9	10	10
42	27.5	8	9	9.5
41	27	7	8	9
40	26	6.5	7.5	8
39	25.5	6	7	7
38	24.5	5	6	6
37	24	4	5	5.5
36	23.5	3.5	4.5	5

Xsjado

The main Xsjado size is US, in half size increments. All parts except the footwraps exist in only two sizes, S which is 4.5-9 US and L which is 9.5-13 US.

US M	EU	UK
13	48	12.5
12.5	47 1/3	12
12	46 2/3	11.5
11.5	46	11
11	45 1/3	10.5
10.5	44 2/3	10
10	44	9.5
9.5	43 1/3	9
9	42 2/3	8.5
8.5	42	8
8	41 1/3	7.5
7.5	40 2/3	7
7	40	6.5
6.5	39 1/3	6
6	38 2/3	5.5
5.5	38	5
5	37 1/3	4.5
4.5	36 2/3	4