J2ME Icon Size

• 1 Nokia
• 2 Motorola
• 3 Palm
• 4 Sony Ericsson
• 5 Sharp
• 6 Samsung
• 7 Vodafone Japan
• 8 Sagem
• 9 Sanyo
• 10 Siemens
• 11 LG

Nokia

• Series 90 - for small size: 25 * 20, for medium/large size: 64 * 50
• Series 80 - Application icon: 64 * 50
• Series 40 - 128x128=16x16, 128x160=24x24, 208x208=46x46, 240x320=46x48
• Series 30 - 16x16.
• 7650/3650 - 32x32
• S60 1st and 2nd - 176x208=42x29, 352x416=76x76
• S60 3rd - 176x208=31x31, 208x176=37x37, 352x416=76x76, 240x320=53x53/55x55, 320x240=52x52/54x54, 208x208=37x37
• N90 - 84x58 (empirical result)

Motorola

• Most MIDP 2.0 - 15x15, PNG, 1bpp, 4bpp, 8pbb, (even 24bpp)

A transparency palette entry will render as gray. (Not sure about alpha channels.)

• A768, E680, and A780 can automatically scale the icons:

The typical size on A768 and E680 is 50x50. And on A780, the icon size is 68x43.

• A388c - 24x24, or smaller eg. 20x20, PNG, MIDlet-Icon
• Motorola Q - 16 x 16, 32 x 32, 22x22, 44x44

In addition to icon sizes of 16x16 and 32x32, application icon sizes shall be 22x22 (small) and 44x44 (large). Sizes are needed depending on the user preferred layout.

Palm

• Treo, Low Res, 22 x 22 and 9 x 15
• Tungsten & Zire, High Rez, 44 x 44 and 18 by 30

Sony Ericsson

• V800 - 24x24
• K700i - No Icon
• T610 - No Icon
• T616 - No Icon
• T618 - No Icon
• T628 - No Icon
• T630 - No Icon
• T637 - No Icon
• Z600 - No Icon
• Z608 - No Icon
• K500 - No Icon
• K506 - No Icon
• K508 - No Icon
• K608i - 16x16
• K700 - No Icon
• Z500 - No Icon
• S700 - No Icon
• S710a - No Icon
• W600i - 16x16
• W900 - 24x24
• JP4,5,6 - 16x16 recommended by SonyEricsson
• P800 - No icon
• P900 - No icon
• P910 - supports icons in various sizes and attempts to scale/adapt these to a size suitable for display. The icon size shouldn't matter, only that smaller ones might show up a bit jagged due to magnification.

Sharp

• GX Series - 24x24

Samsung

• Z140v - Unknown
• Z500 - 40x25
• D807 - 32x32 - Ignores 8-bit transparency, maybe 32-bit alpha would work
• ZX10,ZX20 - 42x36 - same as D807
• All Others - None

Vodafone Japan

• All - 24x24
• 905SH - 42x42
• 903SH - 42x42
• 902SH - 42x42
• 804SH - 42x42
• 705SH - 42x42
• 702SH - 42x42

Sagem

•  ? - 24x24

Sanyo

• 4920 - 9x9 pixels
• 5300 - 16x16 pixels
• 8100 - 15x15 pixels

Siemens

•  ? 14x14

LG

• CU-500 - 15x15 pixels
• GB-230 - 15x15 pixels
• GT-360/KS-360 - 28x28 pixels