How to change arrow of QComboBox

[INeedADollar]

Hello! I have a QComboBox and I want to change the drop arrow, but my arrow is showed very pixelated in QComboBox. I also want to move it to the right and make it bigger. What to solve that?

How my QComboBox looks like:
drop-arrow.png

My arrow image:
arrow-down1.png

type_box->setStyleSheet("QComboBox {  border: 1px solid #dfdede; border-radius: 10px; background: #dfdede; } QComboBox::drop-down:!editable { background: transparent; border: none;} QComboBox::down-arrow {image: url(:/icons/arrow-down.png);}")

type_box->setStyleSheet("QComboBox {  border: 1px solid #dfdede; border-radius: 10px; background: #dfdede; } QComboBox::drop-down:!editable { background: transparent; border: none;} QComboBox::down-arrow {image: url(:/icons/arrow-down.png);}")

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