Image in TSpeedbutton with TImageList

I tried to create a toolbar, using a TToolbar with TActionList, TSpeedbutton and TImageList.
I used square images with 32px, but when I chose the image, by ImageIndex, in the TSpeedButton, the image size is less than 32px, I think is 16px.

How I can set the size of image in TSpeedButtons using a TImageList ?

Here's a MVCE:

unit Unit50;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
  System.Actions, FMX.ActnList, FMX.Controls.Presentation, FMX.StdCtrls,
  System.ImageList, FMX.ImgList;

type
  TForm50 = class(TForm)
    ActionList1: TActionList;
    ImageList1: TImageList;
    SpeedButton1: TSpeedButton;
    Action1: TAction;
  end;

var
  Form50: TForm50;

implementation
{$R *.fmx}
end.

DFM:

object Form50: TForm50
  Left = 0
  Top = 0
  Caption = 'Form50'
  ClientHeight = 480
  ClientWidth = 640
  FormFactor.Width = 320
  FormFactor.Height = 480
  FormFactor.Devices = [Desktop]
  DesignerMasterStyle = 0
  object SpeedButton1: TSpeedButton
    Action = Action1
    Enabled = True
    Images = ImageList1
    ImageIndex = 0
    Position.X = 360.000000000000000000
    Position.Y = 120.000000000000000000
    Visible = True
  end
  object ActionList1: TActionList
    Images = ImageList1
    Left = 272
    Top = 128
    object Action1: TAction
      Text = 'Action1'
      ImageIndex = 0
    end
  end
  object ImageList1: TImageList
    Source = <
      item
        MultiResBitmap.Height = 32
        MultiResBitmap.Width = 32
        MultiResBitmap = <
          item
            Width = 32
            Height = 32
            PNG = {
              89504E470D0A1A0A0000000D4948445200000020000000200806000000737A7A
              F4000000017352474200AECE1CE90000000467414D410000B18F0BFC61050000
              06BA4944415458477557596C9455143EB374BA4C2804A3159382096A30A96C2F
              2A2F4AE20216431482C4170DFAA028C4E89B31C6109F545CA26C01890F2A9620
              098B0F22124A69A1C1C428469BB085049C0A48D7994EDB593CDF59EEFC7F837F
              339D7FEEBDFF3DDFF9CE77CEB97FE2CA378BAB55E2BF2A512241F25DA910A592
              C4034493A52ABE28994CF047E779B9AC9D2C5769D7F976BE4FF038AFB30DB044
              EEB114E3F8E3E771EF17C66037897F6280FF55781E4B5229FDC6FA344FA4526A
              BCCCC0E40210FE4AF3380CB931999BF25B8C8A6370D20CD83D9E4BBAE75894E0
              79007140E2291B0323B68F823420B29F6F6CDE06E486D5D971EF8524018A7D2B
              944CB1456CAAE8953AFC84B7C6A284A30600546B489CE228B5B207E88A007086
              923C5EB1303873B59555D0AC71C29ABAB4FE86193168C8EB987601C8F157C615
              88DFE37978864D24F6A68B2453897137ECA005405236512DF8A7CCB4006D097B
              C9AC4D6A488D2D7C9900ED1B7BC198D2A7209D6030E0ACD90D34A0D37810CF00
              219C73BF403F8C80017C4A8897DCEB9828191B9B7600BAC222A9B2B7025CD880
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            FileName = 'C:\Users\Johan\Pictures\avatar.png'
          end>
        Name = 'avatar'
      end>
    Destination = <
      item
        Layers = <
          item
            Name = 'avatar'
            SourceRect.Right = 64.000000000000000000
            SourceRect.Bottom = 64.000000000000000000
          end>
      end
      item
        Layers = <
          item
            Name = 'avatar'
          end>
      end>
    Left = 272
    Top = 256
  end
end

The glyphsize of a TSpeedButton is defined in the stylesheet.
Only there can you change it.

Here's what to do:

First right click the button and choose: edit style (either default or custom).

Choose the glyph in the structure window and change its size to 32x32.

Click Apply and close

You may need to resize the SpeedButton so that it has enough space to display the glyph.
(Ideally you'd do the resize of the speedbutton in the (default) style, but I've taken a shortcut here). It will now display in 32x32.

On a different device you may want to use a different style sheet.
Esp. on some of those ultra high resolution phones.
If so make sure you have have multiple resolution images in your imagelist. If you don't FMX will rescale your image which will not look optimal.