Index: lib/libprocstat/libprocstat.h
===================================================================
--- lib/libprocstat/libprocstat.h
+++ lib/libprocstat/libprocstat.h
@@ -157,6 +157,8 @@
 	struct sockaddr_storage	sa_peer;	/* Peer address. */
 	int		type;
 	char		dname[32];
+	unsigned int	sendq;
+	unsigned int	recvq;
 };
 
 STAILQ_HEAD(filestat_list, filestat);
Index: lib/libprocstat/libprocstat.c
===================================================================
--- lib/libprocstat/libprocstat.c
+++ lib/libprocstat/libprocstat.c
@@ -1497,6 +1497,8 @@
 				} else
 					sock->inp_ppcb =
 					    (uintptr_t)inpcb.inp_ppcb;
+				sock->sendq = s.so_snd.sb_ccc;
+				sock->recvq = s.so_rcv.sb_ccc;
 			}
 		}
 		break;
@@ -1510,6 +1512,8 @@
 				sock->so_rcv_sb_state = s.so_rcv.sb_state;
 				sock->so_snd_sb_state = s.so_snd.sb_state;
 				sock->unp_conn = (uintptr_t)unpcb.unp_conn;
+				sock->sendq = s.so_snd.sb_ccc;
+				sock->recvq = s.so_rcv.sb_ccc;
 			}
 		}
 		break;
@@ -1556,17 +1560,22 @@
 	switch(sock->dom_family) {
 	case AF_INET:
 	case AF_INET6:
-		if (sock->proto == IPPROTO_TCP)
+		if (sock->proto == IPPROTO_TCP) {
 			sock->inp_ppcb = kif->kf_un.kf_sock.kf_sock_inpcb;
+			sock->sendq = kif->kf_un.kf_sock.kf_sock_sendq;
+			sock->recvq = kif->kf_un.kf_sock.kf_sock_recvq;
+		}
 		break;
 	case AF_UNIX:
 		if (kif->kf_un.kf_sock.kf_sock_unpconn != 0) {
-				sock->so_rcv_sb_state =
-				    kif->kf_un.kf_sock.kf_sock_rcv_sb_state;
-				sock->so_snd_sb_state =
-				    kif->kf_un.kf_sock.kf_sock_snd_sb_state;
-				sock->unp_conn =
-				    kif->kf_un.kf_sock.kf_sock_unpconn;
+			sock->so_rcv_sb_state =
+			    kif->kf_un.kf_sock.kf_sock_rcv_sb_state;
+			sock->so_snd_sb_state =
+			    kif->kf_un.kf_sock.kf_sock_snd_sb_state;
+			sock->unp_conn =
+			    kif->kf_un.kf_sock.kf_sock_unpconn;
+			sock->sendq = kif->kf_un.kf_sock.kf_sock_sendq;
+			sock->recvq = kif->kf_un.kf_sock.kf_sock_recvq;
 		}
 		break;
 	default:
Index: sys/kern/sys_socket.c
===================================================================
--- sys/kern/sys_socket.c
+++ sys/kern/sys_socket.c
@@ -359,6 +359,10 @@
 				inpcb = (struct inpcb *)(so->so_pcb);
 				kif->kf_un.kf_sock.kf_sock_inpcb =
 				    (uintptr_t)inpcb->inp_ppcb;
+				kif->kf_un.kf_sock.kf_sock_sendq =
+				    sbused(&so->so_snd);
+				kif->kf_un.kf_sock.kf_sock_recvq =
+				    sbused(&so->so_rcv);
 			}
 		}
 		break;
@@ -372,6 +376,10 @@
 				    so->so_rcv.sb_state;
 				kif->kf_un.kf_sock.kf_sock_snd_sb_state =
 				    so->so_snd.sb_state;
+				kif->kf_un.kf_sock.kf_sock_sendq =
+				    sbused(&so->so_snd);
+				kif->kf_un.kf_sock.kf_sock_recvq =
+				    sbused(&so->so_rcv);
 			}
 		}
 		break;
Index: sys/sys/user.h
===================================================================
--- sys/sys/user.h
+++ sys/sys/user.h
@@ -344,7 +344,8 @@
 	int64_t		kf_offset;		/* Seek location. */
 	union {
 		struct {
-			uint32_t	kf_spareint;
+			/* Sendq size */
+			uint32_t	kf_sock_sendq;
 			/* Socket domain. */
 			int		kf_sock_domain0;
 			/* Socket type. */
@@ -365,8 +366,8 @@
 			uint16_t	kf_sock_snd_sb_state;
 			/* Receive buffer state. */
 			uint16_t	kf_sock_rcv_sb_state;
-			/* Round to 64 bit alignment. */
-			uint32_t	kf_sock_pad0;
+			/* Recvq size. */
+			uint32_t	kf_sock_recvq;
 		} kf_sock;
 		struct {
 			/* Vnode type. */
Index: usr.bin/procstat/procstat_files.c
===================================================================
--- usr.bin/procstat/procstat_files.c
+++ usr.bin/procstat/procstat_files.c
@@ -534,6 +534,12 @@
 			xo_emit("{:protocol/%-3s/%s} ",
 			    protocol_to_string(sock.dom_family,
 			    sock.type, sock.proto));
+			if (sock.proto == IPPROTO_TCP ||
+			    sock.proto == IPPROTO_SCTP ||
+			    sock.type == SOCK_STREAM) {
+				xo_emit("{:sendq/%u} ", sock.sendq);
+				xo_emit("{:recvq/%u} ", sock.recvq);
+			}
 			/*
 			 * While generally we like to print two addresses,
 			 * local and peer, for sockets, it turns out to be