How can I stop a QPushButton from stretching vertically in a QHBoxLayout?

[MarkLT1]

I am currently trying to make a header bar, that contains a few items- a logo, some space, a store button (with an icon), a Sign Out button, and finally a profile button. The store button should be 24px x 24px. I've stripped down my layout code to the following. Note the fixed size of the _storeButton of 24px x 24px, and setting the sizePolicy to fixed.

	_layout = new QHBoxLayout(this);
	_layout->setContentsMargins(12, 12, 12, 12);
	_logo = new QLabel(this);
	std::string logoPath = imageBaseDir + "logo-full.png";
	QPixmap logoPixmap = QPixmap(logoPath.c_str());
	_logo->setPixmap(logoPixmap);
	_layout->addWidget(_logo);

	_layout->addStretch();

	_storeButton = new QPushButton(this);
	_storeButton->setFixedSize(24, 24);
	_storeButton->setMaximumHeight(24);
        _storeButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
	_storeButton->setStyleSheet(
	    "QPushButton {"
	        "width: 24px;"
	        "height: 24px;"
	        "margin: 0px;"
	        "border: 1px solid #FFFFFF;"
	        "}");
	_layout->addWidget(_storeButton);

	_logOutButton = new QPushButton(this);
	_logOutButton->setText("Sign Out");
	_logOutButton->setStyleSheet(
		"QPushButton {font-size: 12pt; border-radius: 8px; padding: 8px; background-color: #232323; border: none; } "
		"QPushButton:hover {background-color: #444444; }");

	_layout->addWidget(_logOutButton);
	auto avatar = new Avatar(this);
	_layout->addWidget(avatar);

The problem is that the _storeButton widget is being stretched to the height of all the other elements in the QHBoxLayout:

(That empty white box should be 24px x 24px, but is clearly taller than 24px). Any ideas on why this is happening, and how I can force the button to be 24px x 24px?

[Bonnie]

A clean project with above code will give a square button. I guess there's other stylesheet somewhere in its parent widget affecting it, such as min-height. If that's the case, just change the height in its stylesheet to min-height, that'll override the inherited property.

[MarkLT1]

@Bonnie Thank you for pointing me in the right direction. I turns out the issue wasn't height, or min-height, but rather an inherited padding, that just happened to make it look like it was expanding to the full height of the QHBoxLayout.