import {Length} from 'measurement';

const boxFront = new Length('9 ft');
const boxSide = new Length(4, 'ft');
const boxHeight = new Length({value: 4, unit: 'in'})

const boxFront = new Length('9 ft');
console.log(boxFront.to('in'));
// >> 108 in

const distanceA = new Length('9 ft');
const distanceB = new Length('5 m');
console.log(distanceA < distanceB);
// >> true