The good old tried and true method of ensuring a great fit is to grab your favourite fitting garment of a similar style, lay it down on flat surface and measure it in the places shown on the diagrams below and then compare those measurements to the sizes in this chart.
NOTE: Sizes shown below are all GARMENT sizes not body sizes (except swimwear & knitted pullovers).
BLAZER
SIZE	8	10	12	14	16	18	20	22	24	24L	26	26L	28	28L	30	30L
1/2 CHEST	39.5	42	44.5	47	49.5	52	54.5	57	59.5	59.5	62	62	64.5	64.5	67	67
LENGTH	56.5	58	59.5	61	62.5	64	65.5	67	68.5	81	70	82	71.5	83	73	84
GIRLS BLOUSE
SIZE	4Y	6Y	8Y	10Y	12Y	10	12	14	16	18	20	22	24	26
1/2 CHEST	38.5	40.7	42.9	45.1	47.3	49.5	52	54.5	57	59.5	62.5	64.5	67	69.5
LENGTH	45	48	51	54	57	60	61.2	62.4	63.6	64.8	66	67.2	68.4	69.6
GIRLS SUMMER DRESS
SIZE	4Y	6Y	8Y	10Y	12Y	10	12	14	16	18	20	22	24	26
1/2 CHEST	38.5	40.7	42.9	45.1	47.3	49.5	52	54.5	57	59.5	62.5	64.5	67	69.5
LENGTH	63	68	73	78	83	87	91	95	99	101.5	104	106.5	109	111.5
GIRLS PREP SKORT
SIZE	4Y	6Y	8Y	10Y	12Y	14Y	16Y
1/2 WAIST	25	27.1	29.2	31.3	33.4	35.5	37.6
LENGTH	30	33	36	39	42	45	48
GIRLS SENIOR POLY/GABERDINE SKIRT
SIZE	8Y	10Y	12Y	14Y	8	10	12	14	16	18
1/2 WAIST	30	31	32	33	33	35.4	37.8	40.2	42.6	45
LENGTH	52.5	55	60	61	63	63.6	64.2	65.4	66.4	67.4
GIRLS SENIOR WOOL/POLYESTER SKIRT
SIZE	10Y	12Y	14Y	8	10	12	14	16	18	20	22
1/2 WAIST	31	32	33	33	35.4	37.8	40.2	42.6	45	47.4	49.8
LENGTH	55	60	61	63	63.6	64.2	65.4	66.4	67.4	68.4	68.4
BOYS PREP SHIRT
SIZE	4Y	6Y	8Y	10Y	12Y
1/2 CHEST	38	40	42	44	46
LENGTH	47	50	53	56	59
BOYS SENIOR SHIRT
SIZE	10	12	14	16	18	20	22	24	26	28
1/2 CHEST	48	50.5	53	55.5	58	60.5	63	65.5	68	70.5
LENGTH	61	63	65	67	69	71	73	75
BOYS PREP SHORTS
SIZE	4Y	5Y	6Y	7Y	8Y	9Y	10Y	12Y	14Y	16Y
1/2 WAIST	26.5	27.8	29	30.3	31.5	32.8	34	35.3	36.5	37.8
1/2 HIP	39	40.3	41.5	42.8	44	45.3	46.5	47.8	49	50.3
LENGTH	39.8	41	42.2	43.4	44.6	45.8	47	48.2	49.4	50.6
BOYS SENIOR SHORTS
SIZE	10	11	12	13	14	16	18	20	22	24	26	28
1/2 WAIST	36.2	37.5	38.8	40	41.3	42.5	43.8	45	46.3	47.5	48.8	50
1/2 HIP	48	49.3	50.5	51.7	53	54.2	55.5	56.7	58	59.2	60.5	61.7
LENGTH	48.2	49.4	50.6	51.8	53	54.2	55.4	56.6	57.8	57.8	59	59
BOYS PREP LONG PANTS
SIZE	4Y	5Y	6Y	7Y	8Y	9Y	10Y	12Y	14Y	16Y
1/2 WAIST	26.5	27.8	29	30.3	31.5	32.8	34	35.3	36.5	37.8
1/2 HIP	39	40.3	41.5	42.8	44	45.3	46.5	47.8	49	50.3
LENGTH	71	73.3	75.5	78.3	81	85.5	90	95	100	105
BOYS SENIOR LONG PANTS
SIZE	10	11	12	13	14	16	18	20	22	24	26	28
1/2 WAIST	36.2	37.5	38.8	40	41.3	42.5	43.8	45	46.3	47.5	48.8	50
1/2 HIP	48	49.3	50.5	51.7	53	54.2	55.5	56.7	58	59.2	60.5	61.7
LENGTH	95	100	105	105	110	110	110	115	115	115	115	115
GIRLS PINAFORE
SIZE	4Y	6Y	8Y	10Y	12Y	14Y	16Y
1/2 CHEST	39	41.5	44	46.5	49	51.5	54
1/2 WAIST	34	36.5	39	41.5	44	46.5	49
LENGTH	63	68	73	78	83	87	91
SPORTS SKIRT
SIZE	4	6	8	10	12	14	16	18	20	22
1/2 WAIST	25.5	28	30.5	33	35.5	36.75	39.25	42	44.5	47
LENGTH	39	40.4	41.6	42.9	44.2	45.5	46.8	48.1	49.4	50.7
SPORTS SHORTS
SIZE	6XS	5XS	4XS	3XS	2XS	XS	S	M	L	XL	2XL	3XL	4XL
1/2 WAIST	26.7	27.95	29.2	30.45	31.7	32.95	34.2	35.45	36.75	39.25	41.75	44.4	47
1/2 HIP	44.5	47	49.5	52	54.5	57.2	59.75	62.3	64.85	67.4	69.95	72.5	75
LENGTH	38.2	40.8	43.2	45.7	48.2	50.7	53.2	55.7	58.5	59.7	62.3	63.5	64.8
SPORTS POLO
SIZE	4	6	8	10	12	14	16	18	20	22
1/2 CHEST	39.4	42	44.6	47	49.6	52	54.7	57.3	59.8	62.3
LENGTH	54.5	57	60.5	61	63.5	66	68.5	71	73.5	76
SPORTS POLO - LONG SLEEVE
SIZE	4	6	8	10	12	14	16	18	20	22
1/2 CHEST	39.4	42	44.4	47	49.5	52	54.7	57.3	59.8	62.3
LENGTH	54.5	57	60.5	61	63.5	66	68.5	71	73.5	76
TRACKSUIT JACKET
SIZE	4	6	8	10	12	14	S	M	L	XL	2XL	3XL	4XL
1/2 CHEST	42	45	48.5	52	55.5	59	62.5	65	67.5	70	72.5	75	77.5
LENGTH	52	56	60	64	68	72	76	78	80	82	84	86	88
TRACKSUIT PANTS
SIZE	4	6	8	10	12	14	S	M	L	XL	2XL	3XL	4XL
1/2 WAIST	25	26	27	29	31	33	34.5	37	39.5	42	44.5	47	49.5
1/2 HIP	42	44	46	48	50	52	60	62	64	66	68	70	72
LENGTH	66	72	79	87	94	101	106	108	110	112	114	116	118
NOTE: Given the stretch nature of the garment the measurements shown below are body measurements. Please choose a size closest to your actual body measurments.
KNITTED PULLOVER
SIZE	4	6	8	9	10	12	14	16	18	20	22	24	26	28
CHEST	60	65	70	75	80	85	90	95	100	105	110	115	120	125
GIRLS SWIMWEAR
SIZE	6Y	7Y	8Y	10Y	12Y	14Y	8	10	12	14	16	18	20	22
HEIGHT	120	125	130	140	150	160
CHEST	64	66	68	74	80	86	80	85	90	95	100	105	110	115
HIP							85	90	95	100	105	110	115	120
BOYS SWIMWEAR
SIZE	6Y	7Y	8Y	10Y	12Y	14Y	14	16	18	20	22	24	26	28
HEIGHT	120	125	130	140	150	160
WAIST	58	59	60	64	68	72	80	85	90	95	100	105	110	115
AQUA SHORTS
SIZE	14	16	18	20	22
WAIST	80	85	90	95	100
WAIST	32"	34"	36"	38"	40"