A SwiftUI view that uses ViewThatFits to present an SFSymbol tshirt that fits.

ShirtThatFits.swift

//
//  ShirtThatFits.swift
//  ShirtThatFits
//
//  Created by Ryan Lintott on 2022-08-05.
//

import SwiftUI

enum Shirt: Int, RawRepresentable, CaseIterable, Identifiable, Hashable, Codable, View {
    case xs
    case s
    case m
    case l
    case xl
    
    var id: Self { self }
    var string: String { String(describing: self).uppercased() }
    
    var size: CGFloat {
        switch self {
        case .xs: return 100
        case .s: return 150
        case .m: return 220
        case .l: return 300
        case .xl: return 400
        }
    }
    
    static var sizes: ClosedRange<CGFloat> {
        let allSizes = allCases.map(\.size)
        let min = allSizes.min() ?? 0
        let max = allSizes.max() ?? 1
        return min...max
    }
    
    var font: Font {
        .system(size: size * 0.5)
    }
    
    var label: Text {
        Text(string).font(font)
    }
    
    var body: some View {
        Image(systemName: "tshirt")
            .resizable()
            .scaledToFit()
            .overlay(label)
            .frame(width: size)
    }
}

struct ShirtThatFits: View {
    var body: some View {
        ViewThatFits(in: [.horizontal, .vertical]) {
            ForEach(Shirt.allCases.reversed()) {
                $0
            }
        }
    }
}

struct ShirtThatFitsExample_Previews: PreviewProvider {
    struct PreviewData: View {
        @State private var size: CGFloat = 200
        
        var body: some View {
            VStack {
                Spacer()
                
                ZStack(alignment: .top) {
                    Image(systemName: "figure.stand")
                        .resizable()
                        .scaledToFit()
                        .padding(.horizontal, 30)
                        .alignmentGuide(.top) { d in
                            d[.top] + d.height * 0.24
                        }
                    
                    ShirtThatFits()
                        .foregroundColor(.blue)
                }
                .frame(width: size)
                
                Spacer()
                
                Text("ShirtThatFits()")
                    .font(.largeTitle)
            
                Slider(value: $size, in: Shirt.sizes)
                    .padding()
                    .frame(maxWidth: 400)
            }
        }
    }
    
    static var previews: some View {
        PreviewData()
    }
}