var sizes = {
    legs: {
        cm: {
            from: 1,
            to: 100,
            step: 1
        },
        inch: {
            from: 1,
            to: 25,
            step: 1/4
        }
    },
    penis: {
        cm: {
            from: 1,
            to: 40,
            step: 1
        },
        inch: {
            from: 1,
            to: 17,
            step: 1/4
        }
    }
}