Box size spec sheets

Pick an inside size to see what it becomes in practice: its outside size in each flute, what carriers bill it at, how much it should hold in a stack and how it loads on a pallet. Packgent lists no prices and no stockists; every number is computed.

All sizes

C flute outside dimensions; dimensional weight at the verified divisors, checked 2026-10-27
Inside, in	Cube, ft³	C flute OD, in	USPS DW, lb	FedEx DW, lb	Per 48×40 layer
4 × 4 × 4	0.04	4.31 × 4.31 × 4.47	—	1	99
5 × 5 × 5	0.07	5.31 × 5.31 × 5.47	—	1	63
6 × 6 × 6	0.13	6.31 × 6.31 × 6.47	—	2	42
7 × 7 × 7	0.2	7.31 × 7.31 × 7.47	—	3	30
8 × 8 × 8	0.3	8.31 × 8.31 × 8.47	—	4	20
9 × 9 × 9	0.42	9.31 × 9.31 × 9.47	—	6	20
10 × 10 × 10	0.58	10.31 × 10.31 × 10.47	—	8	12
11 × 11 × 11	0.77	11.31 × 11.31 × 11.47	—	10	12
12 × 12 × 12	1	12.31 × 12.31 × 12.47	16	13	9
13 × 13 × 13	1.27	13.31 × 13.31 × 13.47	20	16	9
14 × 14 × 14	1.59	14.31 × 14.31 × 14.47	25	20	6
15 × 15 × 15	1.95	15.31 × 15.31 × 15.47	30	25	6
16 × 16 × 16	2.37	16.31 × 16.31 × 16.47	36	30	4
17 × 17 × 17	2.84	17.31 × 17.31 × 17.47	42	36	4
18 × 18 × 18	3.38	18.31 × 18.31 × 18.47	50	42	4
20 × 20 × 20	4.63	20.31 × 20.31 × 20.47	67	58	2
22 × 22 × 22	6.16	22.31 × 22.31 × 22.47	88	77	2
24 × 24 × 24	8	24.31 × 24.31 × 24.47	113	100	1
26 × 26 × 26	10.17	26.31 × 26.31 × 26.47	142	127	1
28 × 28 × 28	12.7	28.31 × 28.31 × 28.47	176	158	1
30 × 30 × 30	15.63	30.31 × 30.31 × 30.47	215	195	1
6 × 4 × 4	0.06	6.31 × 4.31 × 4.47	—	1	66
6 × 6 × 4	0.08	6.31 × 6.31 × 4.47	—	2	42
7 × 5 × 3	0.06	7.31 × 5.31 × 3.47	—	1	45
7 × 5 × 5	0.1	7.31 × 5.31 × 5.47	—	2	45
8 × 6 × 4	0.11	8.31 × 6.31 × 4.47	—	2	34
8 × 6 × 6	0.17	8.31 × 6.31 × 6.47	—	3	34
8 × 8 × 4	0.15	8.31 × 8.31 × 4.47	—	2	20
8 × 8 × 6	0.22	8.31 × 8.31 × 6.47	—	3	20
9 × 6 × 3	0.09	9.31 × 6.31 × 3.47	—	2	30
9 × 6 × 4	0.13	9.31 × 6.31 × 4.47	—	2	30
9 × 7 × 5	0.18	9.31 × 7.31 × 5.47	—	3	26
9 × 9 × 6	0.28	9.31 × 9.31 × 6.47	—	4	20
10 × 6 × 4	0.14	10.31 × 6.31 × 4.47	—	2	27
10 × 7 × 5	0.2	10.31 × 7.31 × 5.47	—	3	21
10 × 8 × 4	0.19	10.31 × 8.31 × 4.47	—	3	18
10 × 8 × 6	0.28	10.31 × 8.31 × 6.47	—	4	18
10 × 8 × 8	0.37	10.31 × 8.31 × 8.47	—	5	18
10 × 10 × 4	0.23	10.31 × 10.31 × 4.47	—	3	12
10 × 10 × 6	0.35	10.31 × 10.31 × 6.47	—	5	12
10 × 10 × 8	0.46	10.31 × 10.31 × 8.47	—	6	12
11 × 8 × 4	0.2	11.31 × 8.31 × 4.47	—	3	17
11 × 8 × 6	0.31	11.31 × 8.31 × 6.47	—	4	17
11 × 9 × 6	0.34	11.31 × 9.31 × 6.47	—	5	16
12 × 6 × 6	0.25	12.31 × 6.31 × 6.47	—	4	21
12 × 8 × 4	0.22	12.31 × 8.31 × 4.47	—	3	16
12 × 8 × 6	0.33	12.31 × 8.31 × 6.47	—	5	16
12 × 8 × 8	0.44	12.31 × 8.31 × 8.47	—	6	16
12 × 9 × 3	0.19	12.31 × 9.31 × 3.47	—	3	15
12 × 9 × 4	0.25	12.31 × 9.31 × 4.47	—	4	15
12 × 9 × 6	0.38	12.31 × 9.31 × 6.47	—	5	15
12 × 9 × 9	0.56	12.31 × 9.31 × 9.47	—	7	15
12 × 10 × 4	0.28	12.31 × 10.31 × 4.47	—	4	12
12 × 10 × 6	0.42	12.31 × 10.31 × 6.47	—	6	12
12 × 10 × 8	0.56	12.31 × 10.31 × 8.47	—	7	12
12 × 10 × 10	0.69	12.31 × 10.31 × 10.47	—	9	12
12 × 12 × 4	0.33	12.31 × 12.31 × 4.47	—	5	9
12 × 12 × 6	0.5	12.31 × 12.31 × 6.47	—	7	9
12 × 12 × 8	0.67	12.31 × 12.31 × 8.47	—	9	9
12 × 12 × 10	0.83	12.31 × 12.31 × 10.47	14	11	9
12 × 12 × 16	1.33	12.31 × 12.31 × 16.47	21	17	9
12 × 12 × 18	1.5	12.31 × 12.31 × 18.47	24	19	9
12 × 12 × 24	2	12.31 × 12.31 × 24.47	31	25	9
13 × 10 × 6	0.45	13.31 × 10.31 × 6.47	—	6	12
13 × 10 × 8	0.6	13.31 × 10.31 × 8.47	—	8	12
14 × 6 × 6	0.29	14.31 × 6.31 × 6.47	—	4	18
14 × 8 × 6	0.39	14.31 × 8.31 × 6.47	—	5	12
14 × 8 × 8	0.52	14.31 × 8.31 × 8.47	—	7	12
14 × 10 × 4	0.32	14.31 × 10.31 × 4.47	—	5	9
14 × 10 × 6	0.49	14.31 × 10.31 × 6.47	—	7	9
14 × 10 × 8	0.65	14.31 × 10.31 × 8.47	—	9	9
14 × 10 × 10	0.81	14.31 × 10.31 × 10.47	14	11	9
14 × 12 × 6	0.58	14.31 × 12.31 × 6.47	—	8	9
14 × 12 × 8	0.78	14.31 × 12.31 × 8.47	13	10	9
14 × 12 × 10	0.97	14.31 × 12.31 × 10.47	16	13	9
14 × 14 × 6	0.68	14.31 × 14.31 × 6.47	—	9	6
14 × 14 × 8	0.91	14.31 × 14.31 × 8.47	15	12	6
14 × 14 × 10	1.13	14.31 × 14.31 × 10.47	18	15	6
14 × 14 × 12	1.36	14.31 × 14.31 × 12.47	22	17	6
15 × 10 × 8	0.69	15.31 × 10.31 × 8.47	—	9	9
15 × 12 × 6	0.63	15.31 × 12.31 × 6.47	—	8	9
15 × 12 × 10	1.04	15.31 × 12.31 × 10.47	17	13	9
15 × 15 × 10	1.3	15.31 × 15.31 × 10.47	21	17	6
16 × 6 × 6	0.33	16.31 × 6.31 × 6.47	—	5	16
16 × 8 × 8	0.59	16.31 × 8.31 × 8.47	—	8	10
16 × 10 × 6	0.56	16.31 × 10.31 × 6.47	—	7	9
16 × 10 × 8	0.74	16.31 × 10.31 × 8.47	—	10	9
16 × 10 × 10	0.93	16.31 × 10.31 × 10.47	15	12	9
16 × 12 × 4	0.44	16.31 × 12.31 × 4.47	—	6	8
16 × 12 × 6	0.67	16.31 × 12.31 × 6.47	—	9	8
16 × 12 × 8	0.89	16.31 × 12.31 × 8.47	15	12	8
16 × 12 × 10	1.11	16.31 × 12.31 × 10.47	18	14	8
16 × 12 × 12	1.33	16.31 × 12.31 × 12.47	21	17	8
16 × 14 × 8	1.04	16.31 × 14.31 × 8.47	17	13	6
16 × 14 × 10	1.3	16.31 × 14.31 × 10.47	21	17	6
16 × 16 × 8	1.19	16.31 × 16.31 × 8.47	19	15	4
16 × 16 × 10	1.48	16.31 × 16.31 × 10.47	23	19	4
16 × 16 × 12	1.78	16.31 × 16.31 × 12.47	28	23	4
16 × 16 × 24	3.56	16.31 × 16.31 × 24.47	52	45	4
17 × 11 × 6	0.65	17.31 × 11.31 × 6.47	—	9	8
17 × 11 × 8	0.87	17.31 × 11.31 × 8.47	14	11	8
17 × 11 × 11	1.19	17.31 × 11.31 × 11.47	19	15	8
17 × 12 × 10	1.18	17.31 × 12.31 × 10.47	19	15	8
17 × 14 × 10	1.38	17.31 × 14.31 × 10.47	22	18	6
18 × 6 × 6	0.38	18.31 × 6.31 × 6.47	—	5	14
18 × 10 × 8	0.83	18.31 × 10.31 × 8.47	14	11	8
18 × 12 × 6	0.75	18.31 × 12.31 × 6.47	13	10	7
18 × 12 × 8	1	18.31 × 12.31 × 8.47	16	13	7
18 × 12 × 10	1.25	18.31 × 12.31 × 10.47	20	16	7
18 × 12 × 12	1.5	18.31 × 12.31 × 12.47	24	19	7
18 × 14 × 8	1.17	18.31 × 14.31 × 8.47	19	15	6
18 × 14 × 12	1.75	18.31 × 14.31 × 12.47	27	22	6
18 × 16 × 10	1.67	18.31 × 16.31 × 10.47	26	21	4
18 × 16 × 12	2	18.31 × 16.31 × 12.47	31	25	4
18 × 18 × 6	1.13	18.31 × 18.31 × 6.47	19	14	4
18 × 18 × 8	1.5	18.31 × 18.31 × 8.47	24	19	4
18 × 18 × 10	1.88	18.31 × 18.31 × 10.47	29	24	4
18 × 18 × 12	2.25	18.31 × 18.31 × 12.47	34	28	4
18 × 18 × 24	4.5	18.31 × 18.31 × 24.47	65	56	4
20 × 10 × 10	1.16	20.31 × 10.31 × 10.47	19	15	6
20 × 12 × 8	1.11	20.31 × 12.31 × 8.47	18	14	6
20 × 12 × 12	1.67	20.31 × 12.31 × 12.47	26	21	6
20 × 14 × 10	1.62	20.31 × 14.31 × 10.47	25	21	4
20 × 14 × 14	2.27	20.31 × 14.31 × 14.47	34	29	4
20 × 16 × 10	1.85	20.31 × 16.31 × 10.47	29	24	4
20 × 16 × 12	2.22	20.31 × 16.31 × 12.47	34	28	4
20 × 16 × 14	2.59	20.31 × 16.31 × 14.47	39	33	4
20 × 16 × 16	2.96	20.31 × 16.31 × 16.47	44	37	4
20 × 20 × 10	2.31	20.31 × 20.31 × 10.47	35	29	2
20 × 20 × 12	2.78	20.31 × 20.31 × 12.47	42	35	2
20 × 20 × 16	3.7	20.31 × 20.31 × 16.47	54	47	2
22 × 14 × 12	2.14	22.31 × 14.31 × 12.47	33	27	4
22 × 16 × 12	2.44	22.31 × 16.31 × 12.47	37	31	4
22 × 18 × 12	2.75	22.31 × 18.31 × 12.47	41	35	4
22 × 18 × 16	3.67	22.31 × 18.31 × 16.47	54	46	4
22 × 22 × 12	3.36	22.31 × 22.31 × 12.47	50	42	2
24 × 6 × 6	0.5	24.31 × 6.31 × 6.47	—	7	9
24 × 12 × 6	1	24.31 × 12.31 × 6.47	17	13	4
24 × 12 × 8	1.33	24.31 × 12.31 × 8.47	22	17	4
24 × 12 × 12	2	24.31 × 12.31 × 12.47	31	25	4
24 × 14 × 12	2.33	24.31 × 14.31 × 12.47	36	30	3
24 × 16 × 12	2.67	24.31 × 16.31 × 12.47	40	34	3
24 × 16 × 16	3.56	24.31 × 16.31 × 16.47	52	45	3
24 × 18 × 12	3	24.31 × 18.31 × 12.47	45	38	3
24 × 18 × 18	4.5	24.31 × 18.31 × 18.47	65	56	3
24 × 20 × 12	3.33	24.31 × 20.31 × 12.47	50	42	2
24 × 20 × 20	5.56	24.31 × 20.31 × 20.47	80	70	2
24 × 24 × 12	4	24.31 × 24.31 × 12.47	59	50	1
24 × 24 × 16	5.33	24.31 × 24.31 × 16.47	77	67	1
24 × 24 × 18	6	24.31 × 24.31 × 18.47	86	75	1
26 × 16 × 12	2.89	26.31 × 16.31 × 12.47	43	36	3
28 × 16 × 12	3.11	28.31 × 16.31 × 12.47	47	39	3
28 × 20 × 16	5.19	28.31 × 20.31 × 16.47	75	65	2
30 × 16 × 12	3.33	30.31 × 16.31 × 12.47	50	42	3
30 × 20 × 12	4.17	30.31 × 20.31 × 12.47	61	52	2
30 × 20 × 20	6.94	30.31 × 20.31 × 20.47	99	87	2
30 × 24 × 18	7.5	30.31 × 24.31 × 18.47	106	94	1
32 × 24 × 18	8	32.31 × 24.31 × 18.47	113	100	1
36 × 6 × 6	0.75	36.31 × 6.31 × 6.47	14	10	7
36 × 12 × 12	3	36.31 × 12.31 × 12.47	45	38	3
36 × 24 × 24	12	36.31 × 24.31 × 24.47	167	150	1

— means dimensional weight does not apply (USPS only bills it above 1,728 in³). Not the size you need? The Spec Builder works from your product's dimensions.