public class PackSizeModel {

	// here some variable you need to store on the pack size
	private String size;
	private float price;
	// I don't know what's the type (string, int, float) of your datas...

	// here the constructors
	public PackSizeModel() { }

	public PackSizeModel(String size, float price) {
		this.setSize(size);
		this.setPrice(price);
	}

	// setters
    public void setSize(String size) {
		this.size = size;
    }

    public void setPrice(float price) {
		this.price = price;
    }

	// your actual getters
	public String getPackSize_packSize() {
		return this.size;
	}

	public float getPackSize_sellingPrice() {
		return this.price;
	}
}