CSS3 Box-sizing

Method of specifying whether or not an element's borders and padding should be included in size units

Spec	http://www.w3.org/TR/css3-ui/#box-sizing
Status	W3C Candidate Recommendation

IE	Edge	Firefox	Chrome	Safari	Opera
		57	62
		56	61	TP	48
	16	55	60	11	47
11	15	54	59	10.1	46
10	14	53	58	10	45
9	13	52	57	9.1	44
8	12	51	56	9	43
Show all
7		50	55	8	42
6		49	54	7.1	41
5.5		48	53	7	40
		47	52	6.1	39
		46	51	6	38
		45	50	5.1	37
		44	49	5 ^(*)	36
		43	48	4 ^(*)	35
		42	47	3.2 ^(*)	34
		41	46	3.1 ^(*)	33
		40	45		32
		39	44		31
		38	43		30
		37	42		29
		36	41		28
		35	40		27
		34	39		26
		33	38		25
		32	37		24
		31	36		23
		30	35		22
		29	34		21
		28 ^(*)	33		20
		27 ^(*)	32		19
		26 ^(*)	31		18
		25 ^(*)	30		17
		24 ^(*)	29		16
		23 ^(*)	28		15
		22 ^(*)	27		12.1
		21 ^(*)	26		12
		20 ^(*)	25		11.6
		19 ^(*)	24		11.5
		18 ^(*)	23		11.1
		17 ^(*)	22		11
		16 ^(*)	21		10.6
		15 ^(*)	20		10.5
		14 ^(*)	19		10.0-10.1
		13 ^(*)	18		9.5-9.6
		12 ^(*)	17		9
		11 ^(*)	16
		10 ^(*)	15
		9 ^(*)	14
		8 ^(*)	13
		7 ^(*)	12
		6 ^(*)	11
		5 ^(*)	10
		4 ^(*)	9 ^(*)
		3.6 ^(*)	8 ^(*)
		3.5 ^(*)	7 ^(*)
		3 ^(*)	6 ^(*)
		2 ^(*)	5 ^(*)
			4 ^(*)

iOS Safari	Opera Mini	Android Browser	Blackberry Browser	Opera Mobile	Android Chrome	Android Firefox	IE Mobile	Android UC Browser	Samsung Internet	QQ Browser	Baidu Browser
11
10.3	all	56	10	37	59	54	11	11.4	5	1.2	7.12
10.0-10.2		4.4.3-4.4.4	7 ^(*)	12.1			10		4
9.3		4.4		12
9.0-9.2		4.2-4.3		11.5
Show all
8.1-8.4		4.1		11.1
8		4		11
7.0-7.1		3 ^(*)		10
6.0-6.1		2.3 ^(*)
5.0-5.1		2.2 ^(*)
4.2-4.3 ^(*)		2.1 ^(*)
4.0-4.1 ^(*)
3.2 ^(*)

Notes

Firefox currently also supports the padding-box in addition to content-box and border-box, though this value has been removed from the specification.

^* Partial support with prefix.

Bugs

Android browsers do not calculate correctly the dimensions (width and height) of the HTML select element.
Safari 6.0.x does not use box-sizing on elements with display: table;
IE9 will subtract the width of the scrollbar to the width of the element when set to position: absolute / fixed , overflow: auto / overflow-y: scroll
IE 8 ignores box-sizing: border-box if min/max-width/height is used.
Chrome has problems selecting options from the select element when using box-sizing: border-box and browser zoom level is less than 100%.
In IE8, the min-width property applies to content-box even if box-sizing is set to border-box.

Resources

Data by caniuse.com
Licensed under the Creative Commons Attribution License v4.0.
http://caniuse.com/#feat=css3-boxsizing