Increase the width of Content View programmatically in swift

Question

How to increase the width of content view, add some space margin between the elements and distribute equally. Below is the swift code what have i tried.

    class EatTypeCell : UICollectionViewCell{
        @IBOutlet weak var lblTitle: UILabel!
        override func awakeFromNib() {
            self.contentView.applyViewStyle(isRound: true, borderColor: UIColor.ColorGray, borderWidth: 1.5, backGroundColor: UIColor.ColorWhite)
            self.lblTitle.applyStyle(labelFont: UIFont.applySemiBold(fontSize: 11.5), textColor: UIColor.ColorGray)     
        } 
    }
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let height = collectionView.frame.height/2 - 14
        var width : CGFloat = 0
        if self.colEat == collectionView {
        width = self.arrayMeal[indexPath.row].name.sizeOfString(font: UIFont.applySemiBold(fontSize: 11.5)).width + 50
        } 
        return CGSize(width: width, height: height)
    }